Cherry pick GitLab Runner 0.43.0 into '6-2-stable'

What does this MR do?

Cherry pick !2681 (merged) into 6-2-stable, where it should have landed, if not for CI breaking on migrations.

Required

• Merge Request Title and Description are up to date, accurate, and descriptive
• MR targeting the appropriate branch
• MR has a green pipeline on GitLab.com

Expected (please provide an explanation if not completing)

• Test plan indicating conditions for success has been posted and passes
• Documentation created/updated
• Tests added
• Integration tests added to GitLab QA
• Equivalent MR/issue for omnibus-gitlab opened