[Enhancement](metrics) Avoid update_process_fd_num reporting no such file error indiscriminately.

[kaka11chen]

Proposed changes

Cherry-pick from #26013

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...

[kaka11chen]

run buildall

[github-actions]

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

[doris-robot]

TeamCity be ut coverage result:
Function Coverage: 38.19% (7927/20757)
Line Coverage: 30.02% (64146/213658)
Region Coverage: 29.23% (33227/113691)
Branch Coverage: 25.05% (17078/68180)
Coverage Report: http://coverage.selectdb-in.cc/coverage/2b88d17469ce318be319dc9a06032817103b710d_2b88d17469ce318be319dc9a06032817103b710d/report/index.html

[doris-robot]

(From new machine)TeamCity pipeline, clickbench performance test result:
the sum of best hot time: 50.18 seconds
stream load tsv: 554 seconds loaded 74807831229 Bytes, about 128 MB/s
stream load json: 19 seconds loaded 2358488459 Bytes, about 118 MB/s
stream load orc: 65 seconds loaded 1101869774 Bytes, about 16 MB/s
stream load parquet: 32 seconds loaded 861443392 Bytes, about 25 MB/s
insert into select: 29.6 seconds inserted 10000000 Rows, about 337K ops/s
storage size: 17162181813 Bytes