WIP: Update HA docs (!11444) · Merge requests · GitLab.org / GitLab FOSS · GitLab

What does this MR do?

Update HA docs to include some relevant information from https://about.gitlab.com/high-availability and add a warning about AWS EFS

To-Do

Move the relevant DR strategy details from https://about.gitlab.com/high-availability to a DR section of the docs
Link University HA to docs instead of https://about.gitlab.com/high-availability
Update AWS HA guide to show how to install a Linux NFS server instead of use EFS
Link the AWS HA guide from University