add support exec-cpu-affinity

[saku3]

Description

Add cpu affinity setting to the executed process.
Based on the following code, I added support for setting cpu affinity in Youki.
The implementation sets cpu affinity both before and after moving the intermediate process into the cgroup.
I also created tests based on the test cases from runc.

• runtime-spec
• runc
• crun

Summary

• Applies initial CPU affinity in container_intermediate_process before moving to cgroup.
• Applies final CPU affinity in container_intermediate_process after cgroup move.
• Adds cpu_affinity module for parsing cpuset strings and calling sched_setaffinity.

Includes test coverage via contest for:

• CPU affinity from config.json
• CPU affinity from process.json in exec
• Partial affinity (only initial) case

Type of Change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Refactoring (no functional changes)
• Performance improvement
• Test updates
• CI/CD related changes
• Other (please describe):

Testing

• Added new unit tests
• Added new integration tests
• Ran existing test suite
• Tested manually (please provide steps)

Related Issues

Fixes #2795

Additional Context

In runc, exec_cpu_affinity is introduced in version 1.3.0.
Since the current CI uses an older version of runc1.1.11, exec_cpu_affinity is not available and the test(just validate-contest-runc) will be skipped. The tests passed successfully when using runc version 1.3.0-rc.1.

[utam0k]

💯

[utam0k]

@saku3 LGTM except for the conflicts.

[saku3]

@utam0k
Thank you for the review! I've resolved the conflicts.