feature/spaceship: Merge Standard_D16as_v4 VM update

[StephanTLavavej]

Merge #1185 into feature/spaceship so we can delete the old VMSS pool.

⚠️ Note to self: Commit this as a merge, not a squash!

[CaseyCarter]

Approving the list of commits; here's hoping you didn't hack up an artificial parallel git history.

EDIT: I felt bad, and actually verified the changes ;)

[StephanTLavavej]

@CaseyCarter Note that for #1178, I had to prepare a branch in my fork to perform the merge and manually resolve a merge conflict, but for this PR, I was able to submit a merge directly from master to feature/spaceship. In the future, you may be able to save time by noticing non-fork PRs like this, while double-checking any merges from forks (as manual merges make mistakes more likely). Thanks for checking!