Update default kas ports to 8150

What does this MR do?

gitlab-org/cluster-integration/gitlab-agent#30 (closed), we identified that 5005 clashes with nginx/registry in Omnibus. So Omnibus will use port 8150 for kas. We update to 8150 here as well for consistency.

Related issues

gitlab-org/cluster-integration/gitlab-agent#30 (closed)

Checklist

See Definition of done.

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

Test plan

Run helm upgrade gitlab . on an existing instance

See !1587 (comment 433267656) for results

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