T6759: add support for italian keymap

[c-po]

Add italian keyboard support

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/T6759

How to test

set system option keyboard-layout it

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

[c-po]

@Mergifyio backport sagitta circinus

[mergify]

backport sagitta circinus

✅ Backports have been created

• #4136 T6759: add support for italian keymap (backport #4132) has been created for branch sagitta
• #4137 T6759: add support for italian keymap (backport #4132) has been created for branch circinus

[github-actions]

CI integration 👍 passed!

Details

CI logs

• CLI Smoketests 👍 passed
• Config tests 👍 passed
• RAID1 tests 👍 passed
• TPM tests 👍 passed