Add serviceAccountName to upgrade check

What does this MR do?

Adds serviceAccountName to upgrade job

Related issues

Closes #2669 (closed)

Checklist

See Definition of done.

For anything in this list which will not be completed, please provide a reason in the MR discussion.

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
  • I did not know how to create these test plans, but I noticed there was no serviceAccountName before the change but there was after the change
• Documentation created/updated
  • None needed
• Tests added
  • See above
• Integration tests added to GitLab QA
  • None needed
• Equivalent MR/issue for omnibus-gitlab opened
  • None needed