Preparing 9.3.3-ee release

Summary

This MR prepares 9-3-stable-ee for %9.3 Next Patch Release (9.3.3) by merging 9-3-stable-ee-patch-3 into 9-3-stable

MR Filter for ~"Pick into Stable" MRs

https://gitlab.com/gitlab-org/gitlab-ee/merge_requests?label_name%5B%5D=Pick+into+Stable&milestone_title=9.3&scope=all&sort=updated_asc&state=merged

Steps

• Ensure all the MRs in above list are picked into 9-3-stable-ee-patch-3 branch.

• If there are any conflicts while picking MRs, attempt to resolve, otherwise create new MR against 9-3-stable-ee-patch-3 branch and assign it to author of conflicting files.

• Consider merging CE-to-EE stable MR into this as well for new workflow

• Once this MR is green merge it.

Todo

• Run mysql tests, possibly by changing .gitlab-ci.yml to run them on stable (https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/12552). Not needed as //@gitlab-org/gitlab-ee should mean these always run for EE