ci: init labels workflow

[macintoshpie]

Any background context you want to provide?

See linked issue

What does this PR do?

• add CI requirements for PR labeling.

How should this be manually tested?

• feel free to add/remove labels to this PR to test.

What are the relevant tickets?

405

Screenshots (if appropriate)

[nllong]

I like your testing ;D

[nllong]

back port this to develop-v2 as well?