[qt/clang/llvm-project]: Summary of bulk changes made

Git repository change summary for qt/clang/llvm-project
Pushed by mirror-service into branch 'upstream/users/ojhunt/simplify-operator-new-overload-resolution'.
Changed from 57bdce15a0a723e87c086fd64d4a5803bcaf3e5f to 2e695908b66d263b44be81785913b4d0c0e77adb
Acknowledgement was received that this change introduces only existing code that has been pushed to another public open source repository.

This change contains the following new commits:

Git commit 2e695908b66d263b44be81785913b4d0c0e77adb by Oliver Hunt on 27/07/2026 at 01:11..
Stop mutating the initial LookupResult, and instead use an optional buffer
for the MSVC fallback.

The refactoring actually removed the need for a the old "did we try type
aware allocators", and a few other things also got cleaned up.
https://invent.kde.org/qt/clang/llvm-project/-/commit/2e695908b66d263b44be81785913b4d0c0e77adb