[fix](common) implement the move assignment operator for Status

[AshinGau]

Proposed changes

Status's move assignment operator is a default function, which can't move the unique pointer of _err_msg correctly, and _err_msg may be an uninitialized pointer when assigning OK.
In the process of return value optimization, the move assignment operator will be called, so the following error is thrown when initializing the BE's file cache:

 0# doris::signal::(anonymous namespace)::FailureSignalHandler(int, siginfo_t*, void*) at /mnt/disk1/lidongyang/doris/be/src/common/signal_handler.h:413
 1# os::Linux::chained_handler(int, siginfo_t*, void*) in /usr/lib/jvm/java-11-openjdk-amd64/lib/server/libjvm.so
 2# JVM_handle_linux_signal in /usr/lib/jvm/java-11-openjdk-amd64/lib/server/libjvm.so
 3# signalHandler(int, siginfo_t*, void*) in /usr/lib/jvm/java-11-openjdk-amd64/lib/server/libjvm.so
 4# 0x00007F0336132090 in /lib/x86_64-linux-gnu/libc.so.6
 5# doris::io::FileCacheFactory::create_file_cache(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, doris::io::FileCacheSettings const&, doris::Status*) at /mnt/disk1/lidongyang/doris/be/src/io/cache/block/block_file_cache_factory.cpp:75
 6# doris::ThreadPool::dispatch_thread() in /root/20230822114947-doris-branch-2_0-9c0138f1ca/be/lib/doris_be
 7# doris::Thread::supervise_thread(void*) at /mnt/disk1/lidongyang/doris/be/src/util/thread.cpp:466
 8# start_thread at /build/glibc-SzIz7B/glibc-2.31/nptl/pthread_create.c:478
 9# __clone at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Where *status = cache->initialize() will call the move assignment operator, but _err_msg is not a nullptr with unexpected value.

Complete Error Stack in GDB

Thread 43 "FileCacheInitTh" hit Catchpoint 1 (signal SIGSEGV), std::__uniq_ptr_impl<doris::Status::ErrMsg, std::default_delete<doris::Status::ErrMsg> >::reset (this=0x7fffcfc56558, __p=0x0)
    at /mnt/datadisk0/gaoxin/doris/ldb_toolchain/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/bits/unique_ptr.h:182
182	/mnt/datadisk0/gaoxin/doris/ldb_toolchain/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/bits/unique_ptr.h: No such file or directory.
(gdb) bt
#0  std::__uniq_ptr_impl<doris::Status::ErrMsg, std::default_delete<doris::Status::ErrMsg> >::reset (this=0x7fffcfc56558, __p=0x0)
    at /mnt/datadisk0/gaoxin/doris/ldb_toolchain/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/bits/unique_ptr.h:182
#1  std::__uniq_ptr_impl<doris::Status::ErrMsg, std::default_delete<doris::Status::ErrMsg> >::operator= (this=0x7fffcfc56558, __u=...)
    at /mnt/datadisk0/gaoxin/doris/ldb_toolchain/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/bits/unique_ptr.h:167
#2  std::__uniq_ptr_data<doris::Status::ErrMsg, std::default_delete<doris::Status::ErrMsg>, true, true>::operator= (
    this=0x7fffcfc56558)
    at /mnt/datadisk0/gaoxin/doris/ldb_toolchain/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/bits/unique_ptr.h:212
#3  std::unique_ptr<doris::Status::ErrMsg, std::default_delete<doris::Status::ErrMsg> >::operator= (this=0x7fffcfc56558)
    at /mnt/datadisk0/gaoxin/doris/ldb_toolchain/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/bits/unique_ptr.h:371
#4  doris::Status::operator= (this=0x7fffcfc56550, rhs=...) at /mnt/datadisk0/gaoxin/ws/doris/be/src/common/status.h:335
#5  doris::io::FileCacheFactory::create_file_cache (this=0x55556b349190 <doris::io::FileCacheFactory::instance()::ret>,
    cache_base_path=..., file_cache_settings=..., status=0x7fffcfc56550)
    at /mnt/datadisk0/gaoxin/ws/doris/be/src/io/cache/block/block_file_cache_factory.cpp:75
#6  0x000055556104ffbf in doris::ThreadPool::dispatch_thread (this=0x7fffd47a44c0)
    at /mnt/datadisk0/gaoxin/ws/doris/be/src/util/threadpool.cpp:531
#7  0x000055556104725c in std::function<void ()>::operator()() const (this=0x7fffd371c2d8)
    at /mnt/datadisk0/gaoxin/doris/ldb_toolchain/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/bits/std_function.h:560
#8  doris::Thread::supervise_thread (arg=0x7fffd3e0ed60) at /mnt/datadisk0/gaoxin/ws/doris/be/src/util/thread.cpp:465
#9  0x00007ffff7c37609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#10 0x00007ffff7ec6133 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
(gdb) up 2
#2  std::__uniq_ptr_data<doris::Status::ErrMsg, std::default_delete<doris::Status::ErrMsg>, true, true>::operator= (
    this=0x7fffcfc56558)
    at /mnt/datadisk0/gaoxin/doris/ldb_toolchain/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/bits/unique_ptr.h:212
212	in /mnt/datadisk0/gaoxin/doris/ldb_toolchain/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/bits/unique_ptr.h
(gdb) up 2
#4  doris::Status::operator= (this=0x7fffcfc56550, rhs=...) at /mnt/datadisk0/gaoxin/ws/doris/be/src/common/status.h:335
335	/mnt/datadisk0/gaoxin/ws/doris/be/src/common/status.h: No such file or directory.
(gdb) bt
#0  std::__uniq_ptr_impl<doris::Status::ErrMsg, std::default_delete<doris::Status::ErrMsg> >::reset (this=0x7fffcfc56558, __p=0x0)
    at /mnt/datadisk0/gaoxin/doris/ldb_toolchain/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/bits/unique_ptr.h:182
#1  std::__uniq_ptr_impl<doris::Status::ErrMsg, std::default_delete<doris::Status::ErrMsg> >::operator= (this=0x7fffcfc56558, __u=...)
    at /mnt/datadisk0/gaoxin/doris/ldb_toolchain/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/bits/unique_ptr.h:167
#2  std::__uniq_ptr_data<doris::Status::ErrMsg, std::default_delete<doris::Status::ErrMsg>, true, true>::operator= (
    this=0x7fffcfc56558)
    at /mnt/datadisk0/gaoxin/doris/ldb_toolchain/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/bits/unique_ptr.h:212
#3  std::unique_ptr<doris::Status::ErrMsg, std::default_delete<doris::Status::ErrMsg> >::operator= (this=0x7fffcfc56558)
    at /mnt/datadisk0/gaoxin/doris/ldb_toolchain/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/bits/unique_ptr.h:371
#4  doris::Status::operator= (this=0x7fffcfc56550, rhs=...) at /mnt/datadisk0/gaoxin/ws/doris/be/src/common/status.h:335
#5  doris::io::FileCacheFactory::create_file_cache (this=0x55556b349190 <doris::io::FileCacheFactory::instance()::ret>,
    cache_base_path=..., file_cache_settings=..., status=0x7fffcfc56550)
    at /mnt/datadisk0/gaoxin/ws/doris/be/src/io/cache/block/block_file_cache_factory.cpp:75
#6  0x000055556104ffbf in doris::ThreadPool::dispatch_thread (this=0x7fffd47a44c0)
    at /mnt/datadisk0/gaoxin/ws/doris/be/src/util/threadpool.cpp:531
#7  0x000055556104725c in std::function<void ()>::operator()() const (this=0x7fffd371c2d8)
    at /mnt/datadisk0/gaoxin/doris/ldb_toolchain/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/bits/std_function.h:560
#8  doris::Thread::supervise_thread (arg=0x7fffd3e0ed60) at /mnt/datadisk0/gaoxin/ws/doris/be/src/util/thread.cpp:465
#9  0x00007ffff7c37609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#10 0x00007ffff7ec6133 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Further comments

If this is a relatively large or complex change, kick off the discussion at dev@doris.apache.org by explaining why you chose the solution you did and what alternatives you considered, etc...

[AshinGau]

run buildall

[github-actions]

clang-tidy review says "All clean, LGTM! 👍"

[yiguolei]

LGTM

[github-actions]

PR approved by at least one committer and no changes requested.

[github-actions]

PR approved by anyone and no changes requested.

[hello-stephen]

(From new machine)TeamCity pipeline, clickbench performance test result:
the sum of best hot time: 45.63 seconds
stream load tsv: 541 seconds loaded 74807831229 Bytes, about 131 MB/s
stream load json: 20 seconds loaded 2358488459 Bytes, about 112 MB/s
stream load orc: 65 seconds loaded 1101869774 Bytes, about 16 MB/s
stream load parquet: 30 seconds loaded 861443392 Bytes, about 27 MB/s
insert into select: 29.5 seconds inserted 10000000 Rows, about 338K ops/s
storage size: 17161871885 Bytes

[morningman]

LGTM