eapol: T4782: Support multiple CA chains

[sarthurdev]

Change Summary

Updates eapol with support for multiple CA chains

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/T4782

Component(s) name

eapol

Proposed changes

• Changes ca-certificate node to multi node
• Updated smoketest to verify

How to test

Updated smoketest passes:

test_eapol_support (__main__.EthernetInterfaceTest.test_eapol_support) ... ok

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