T6674: Add build-scrips for packages without Jenkins

[sever-sever]

Change Summary

Add build scripts for .deb packages without Jenkins. To exclude Jenkins we need some place where we can put new builds-scripts to run in parallel (old/new) during meantime. We will deprecate old Jenkins package builds in the future.

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/T6674

Component(s) name

package-build

Proposed changes

How to test

Checklist:

• I have read the CONTRIBUTING document
• I have linked this PR to one or more Phabricator Task(s)
• My commit headlines contain a valid Task id
• My change requires a change to the documentation
• I have updated the documentation accordingly

[github-actions]

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