feat(new): Added Azure.APIM.AvailabilityZone.Units

[BenjaminEngeset]

PR Summary

Fixes #2788

Added Azure.APIM.AvailabilityZone.Units.

PR Checklist

• [x] PR has a meaningful title
• [x] Summarized changes
• [x] Change is not breaking
• [x] This PR is ready to merge and is not Work in Progress
• Rule changes
  • [x] Unit tests created/ updated
  • [x] Rule documentation created/ updated
  • [x] Link to a filed issue
  • [x] Change log has been updated with change under unreleased section
• Other code changes
  • [ ] Unit tests created/ updated
  • [ ] Link to a filed issue
  • [ ] Change log has been updated with change under unreleased section

[BenjaminEngeset]

Hi @BernieWhite. Let me know your thoughts on this one.

[BenjaminEngeset]

@BernieWhite I'd also like to know what to do with the tests. With the scenarios I have added I'm causing a lot of change for the other tests already created and implemented. I can update them, but want to know before doing so, as it is some effort.

[BernieWhite]

@BenjaminEngeset Thanks for your efforts so far. I think there is duplication with Azure.APIM.AvailabilityZone. Let's park this until we confirm with Jack if there is any changes required to the existing rule.

[BenjaminEngeset]

As discussed in #2788, let's close this PR and I will instead a create a new one with what we have aligned on.