T7069: Add function to get available cpus

[natali-rs1985]

Change summary

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Code style update (formatting, renaming)
• Refactoring (no functional changes)
• Migration from an old Vyatta component to vyos-1x, please link to related PR inside obsoleted component
• Other (please describe):

Related Task(s)

• https://vyos.dev/T7069

Related PR(s)

vyos/vyos-vpp#8

How to test / Smoketest result

>>> from vyos.utils.cpu import get_available_cpus
>>> get_available_cpus()
[{'cpu': 0, 'node': 0, 'socket': 0, 'core': 0, 'l1d:l1i:l2:l3': '0:0:0:0', 'online': True}, {'cpu': 1, 'node': 0, 'socket': 0, 'core': 1, 'l1d:l1i:l2:l3': '1:1:1:0', 'online': True}, {'cpu': 2, 'node': 0, 'socket': 0, 'core': 2, 'l1d:l1i:l2:l3': '2:2:2:0', 'online': True}, {'cpu': 4, 'node': 0, 'socket': 0, 'core': 3, 'l1d:l1i:l2:l3': '4:4:4:0', 'online': True}]

Checklist:

• I have read the CONTRIBUTING document
• I have linked this PR to one or more Phabricator Task(s)
• I have run the components SMOKETESTS if applicable
• My commit headlines contain a valid Task id
• My change requires a change to the documentation
• I have updated the documentation accordingly

[github-actions]

👍
No issues in PR Title / Commit Title

[dmbaturin]

We may change it to read and process /proc/cpuinfo at a later point. For now, I'm not against an external command call, since it's not done especially often.

[github-actions]

CI integration ❌ failed!

Details

CI logs

• CLI Smoketests (no interfaces) ❌ failed
• CLI Smoketests (interfaces only) 👍 passed
• Config tests 👍 passed
• RAID1 tests 👍 passed
• TPM tests 👍 passed