[clang] [RFC] Initial implementation of P2719 (PR #113510)

[Oliver Hunt via cfe-commits]

ojhunt wrote:

Could anyone with a windows machine see if you can work out what is happening with the windows test failure? I don't understand why the tests are failing on the windows bot as it seems like it should simply fail everything (e.g. windows driver is going wrong) or it should work

https://github.com/llvm/llvm-project/pull/113510