[clang] [OpenMP] codegen support for masked combined construct parallel masked taskloop (PR #121741)

[CHANDRA GHALE via cfe-commits]

chandraghale wrote:

> Also update ReleaseNotes.rst here and in other patches

@alexey-bataev release notes updated.  Updated for other patches as well in this PR. 

https://github.com/llvm/llvm-project/pull/121741