Add Alpine packaging and testing github action workflow

[liveans]

Description

Add alpine packaging scripts with doc.

This PR adds two different main stuff:

• APKBUILD (Alpine Packaging Script) creator script
• Testing pipeline of packaging.

Testing

CI

Documentation

New doc added related to Alpine packaging steps.

[liveans]

I marked this as ready for review, but I have another idea for PR packaging which will be almost same as production packaging. I'll give it a try.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.86%. Comparing base (ee4a1bc) to head (e42fbe1).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4554      +/-   ##
==========================================
- Coverage   87.61%   86.86%   -0.75%     
==========================================
  Files          56       56              
  Lines       17354    17354              
==========================================
- Hits        15204    15074     -130     
- Misses       2150     2280     +130     

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[liveans]

This is ready for review @nibanks

[liveans]

@nibanks If there is something you're not happy about in this PR, please let me know, I can fix it accordingly.

[nibanks]

Any practical hope to automate this?

[liveans]

If we can have dedicated gitlab.alpinelinux.org account with an official microsoft email, I can automate this over gitlab APIs in Azure pipeline.

[liveans]

@nibanks Would you mind to backport this to release/2.4?

[nibanks]

@nibanks Would you mind to backport this to release/2.4?

If you create the PR, I will approve it. Do we need to create a new release for this though? I just kicked off the process for v2.4.5, and would prefer to not have to do it for just this.

[liveans]

@nibanks Would you mind to backport this to release/2.4?

If you create the PR, I will approve it. Do we need to create a new release for this though? I just kicked off the process for v2.4.5, and would prefer to not have to do it for just this.

We don't need a new release, I'll just copy script as a workaround for this release and create necessary APKBUILD file and update Alpine package on aports when packages are available on PMC.