Prepare 11.11.2 release

Release issue: gitlab-org/release/tasks#790 (closed)

Summary

This MR prepares 11-11-stable for 11.11.2.

Automated cherry-picking

Merge requests labeled ~"Pick into 11.11" should be automatically picked into both the CE and EE prepration MRs using the following ChatOps command:

# In Slack
/chatops run release merge 11.11.2