T7250: fix auto completion for op command show file

[Yuanandcircle]

Auto completion for op command show file is broken. When pressing tab for auto completion, an error Invalid command: [_vyatta_image_file_complete] is returned because legacy Vyatta interpreter file vyatta-image-complete has been removed.

Change summary

Add legacy Vyatta interpreter file vyatta-image-complete.

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/T7250

Related PR(s)

How to test / Smoketest result

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 ❌ failed!

Details

CI logs

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