ARROW-17037: [C++] Split utf8.h to avoid exposing xsimd dependency to third-party code

[pitrou]

No description provided.

[github-actions]

https://issues.apache.org/jira/browse/ARROW-17037

[github-actions]

⚠️ Ticket has not been started in JIRA, please click 'Start Progress'.

[pitrou]

@github-actions crossbow submit -g cpp

[pitrou]

cc @AlenkaF

[github-actions]

Revision: 9ac72de53fdfc6dde9d8dff5163f20f879d56035

Submitted crossbow builds: ursacomputing/crossbow @ actions-8e43da909f

Task	Status
test-build-cpp-fuzz
test-conda-cpp
test-conda-cpp-valgrind
test-debian-10-cpp-amd64
test-debian-10-cpp-i386
test-debian-11-cpp-amd64
test-debian-11-cpp-i386
test-fedora-35-cpp
test-ubuntu-18.04-cpp
test-ubuntu-18.04-cpp-release
test-ubuntu-18.04-cpp-static
test-ubuntu-20.04-cpp
test-ubuntu-20.04-cpp-14
test-ubuntu-20.04-cpp-17
test-ubuntu-20.04-cpp-bundled
test-ubuntu-20.04-cpp-thread-sanitizer
test-ubuntu-22.04-cpp

[pitrou]

@ursabot please benchmark lang=C++

[ursabot]

Benchmark runs are scheduled for baseline = 1635f3b and contender = 9ac72de53fdfc6dde9d8dff5163f20f879d56035. Results will be available as each benchmark for each run completes.
Conbench compare runs links:
[Skipped ⚠️ Only ['Python'] langs are supported on ec2-t3-xlarge-us-east-2] ec2-t3-xlarge-us-east-2
[Failed] test-mac-arm
[Skipped ⚠️ Only ['JavaScript', 'Python', 'R'] langs are supported on ursa-i9-9960x] ursa-i9-9960x
[Failed] ursa-thinkcentre-m75q
Buildkite builds:
[Failed] 9ac72de5 test-mac-arm
[Failed] 9ac72de5 ursa-thinkcentre-m75q
[Finished] 1635f3ba ec2-t3-xlarge-us-east-2
[Failed] 1635f3ba test-mac-arm
[Failed] 1635f3ba ursa-i9-9960x
[Failed] 1635f3ba ursa-thinkcentre-m75q
Supported benchmarks:
ec2-t3-xlarge-us-east-2: Supported benchmark langs: Python, R. Runs only benchmarks with cloud = True
test-mac-arm: Supported benchmark langs: C++, Python, R
ursa-i9-9960x: Supported benchmark langs: Python, R, JavaScript
ursa-thinkcentre-m75q: Supported benchmark langs: C++, Java

[cyb70289]

Benchmark failure is strange. But looks not related to this PR.

[pitrou]

@github-actions crossbow submit -g cpp

[pitrou]

@ursabot please benchmark lang=C++

[ursabot]

Benchmark runs are scheduled for baseline = efd7c3a and contender = bfa35ae. Results will be available as each benchmark for each run completes.
Conbench compare runs links:
[Skipped ⚠️ Only ['Python'] langs are supported on ec2-t3-xlarge-us-east-2] ec2-t3-xlarge-us-east-2
[Failed] test-mac-arm
[Skipped ⚠️ Only ['JavaScript', 'Python', 'R'] langs are supported on ursa-i9-9960x] ursa-i9-9960x
[Failed] ursa-thinkcentre-m75q
Buildkite builds:
[Failed] bfa35aee test-mac-arm
[Failed] bfa35aee ursa-thinkcentre-m75q
[Finished] efd7c3a0 ec2-t3-xlarge-us-east-2
[Failed] efd7c3a0 test-mac-arm
[Failed] efd7c3a0 ursa-i9-9960x
[Failed] efd7c3a0 ursa-thinkcentre-m75q
Supported benchmarks:
ec2-t3-xlarge-us-east-2: Supported benchmark langs: Python, R. Runs only benchmarks with cloud = True
test-mac-arm: Supported benchmark langs: C++, Python, R
ursa-i9-9960x: Supported benchmark langs: Python, R, JavaScript
ursa-thinkcentre-m75q: Supported benchmark langs: C++, Java

[github-actions]

Revision: bfa35ae

Submitted crossbow builds: ursacomputing/crossbow @ actions-09a1466066

Task	Status
test-build-cpp-fuzz
test-conda-cpp
test-conda-cpp-valgrind
test-debian-10-cpp-amd64
test-debian-10-cpp-i386
test-debian-11-cpp-amd64
test-debian-11-cpp-i386
test-fedora-35-cpp
test-ubuntu-18.04-cpp
test-ubuntu-18.04-cpp-release
test-ubuntu-18.04-cpp-static
test-ubuntu-20.04-cpp
test-ubuntu-20.04-cpp-14
test-ubuntu-20.04-cpp-17
test-ubuntu-20.04-cpp-bundled
test-ubuntu-20.04-cpp-thread-sanitizer
test-ubuntu-22.04-cpp

[cyb70289]

+1