[clang] [Clang] Support MSPropertyRefExpr as placement arg to new-expression (PR #75883)

[Erich Keane via cfe-commits]

erichkeane wrote:

> Just did another rebase to update the release notes.
> 
> Is there anything else that needs to be done for this pr?

Nope!  Once the CI is done, feel free to Squash & Merge.

https://github.com/llvm/llvm-project/pull/75883