[10.0.0 Release] We're behind schedule

Hello everyone,

Today was the scheduled day for the final release tag, but the release
is not ready yet.

There are still a bunch of open blockers at https://llvm.org/PR44555

Any help on these is very much appreciated.

My ambition is to get most of these fixed by the end of the week, tag
RC3, and get this release out the door as soon as possible.