clang: Apply upstream D152570

[dankm]

This fixes real file names appearing in lambda names that are used as arguments to function templates.

This fixes llvm/llvm-project#63219, which I spotted when building cmake.

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[dankm]

Sure, I'll probably do that Monday. I'll also request llvm/llvm-project#62192 while at it.

[dankm]

Requested a couple backports: llvm/llvm-project#63356

[dankm]

@kraj looks like there won't be any backports: https://discourse.llvm.org/t/16-0-6-release/71344

LLVM 16.x is apparently closed, but at least these changes will be in LLVM 17.

[kraj]

@kraj looks like there won't be any backports: https://discourse.llvm.org/t/16-0-6-release/71344

LLVM 16.x is apparently closed, but at least these changes will be in LLVM 17.

ok