smoketest: T7023: add tac_plus container to live validate login

[c-po]

Change summary

TACACS is pretty sensible to its configuration. Instead of manual testing, extend the smoketest platform to ship a tac_plus container and perform logins against a locally running tac_plus server in a container.

The login username/password and TACACS shared secret is generated randomly on the fly for every testcase.

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/T7023

Related PR(s)

How to test / Smoketest result

vyos@vyos:~$ /usr/libexec/vyos/tests/smoke/cli/test_system_login.py
test_add_linux_system_user (__main__.TestSystemLogin.test_add_linux_system_user) ... ok
test_delete_current_user (__main__.TestSystemLogin.test_delete_current_user) ... ok
test_radius_kernel_features (__main__.TestSystemLogin.test_radius_kernel_features) ... ok
test_system_login_max_login_session (__main__.TestSystemLogin.test_system_login_max_login_session) ... ok
test_system_login_otp (__main__.TestSystemLogin.test_system_login_otp) ... ok
test_system_login_radius_ipv4 (__main__.TestSystemLogin.test_system_login_radius_ipv4) ... ok
test_system_login_radius_ipv6 (__main__.TestSystemLogin.test_system_login_radius_ipv6) ... ok
test_system_login_tacacs (__main__.TestSystemLogin.test_system_login_tacacs) ... ok
test_system_login_user (__main__.TestSystemLogin.test_system_login_user) ... ok
test_system_user_ssh_key (__main__.TestSystemLogin.test_system_user_ssh_key) ... ok

----------------------------------------------------------------------
Ran 10 tests in 99.663s

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

[github-actions]

👍
No issues in PR Title / Commit Title

[github-actions]

CI integration 👍 passed!

Details

CI logs

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