op-mode: T6524: rewrite "release dhcp(v6) interface" to new op-mode format

[c-po]

Change Summary

Migrate the last legacy op-mode part using vyatta-interfaces.pl to the new Python code base

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/T6524

Related PR(s)

• T6524: remove vyatta-interfaces.pl, no longer required vyatta-cfg-system#223
• T6524: remove node.def files for "release" CLI tree vyatta-op#92

Component(s) name

Proposed changes

How to test

vyos@vyos:~$ release dhcp interface eth0
Release DHCP client on interface eth0...

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]

❌ VyOS CLI smoketests failed!

[c-po]

@Mergifyio backport circinus

[mergify]

backport sagitta

✅ Backports have been created

• #3741 op-mode: T6524: rewrite "release dhcp(v6) interface" to new op-mode format (backport #3733) has been created for branch sagitta

[mergify]

backport circinus

✅ Backports have been created

• #3742 op-mode: T6524: rewrite "release dhcp(v6) interface" to new op-mode format (backport #3733) has been created for branch circinus

[c-po]

@Mergifyio backport circinus

[mergify]

backport circinus

✅ Backports have been created

• #3742 op-mode: T6524: rewrite "release dhcp(v6) interface" to new op-mode format (backport #3733) has been created for branch circinus