[clang] -fsanitize=function: fix MSVC hashing to sugared type (PR #66816)

[Alexandre Ganea via cfe-commits]

================
@@ -3838,13 +3838,13 @@ void MicrosoftMangleContextImpl::mangleSEHFinallyBlock(
   Mangler.mangleName(EnclosingDecl);
 }
 
-void MicrosoftMangleContextImpl::mangleTypeName(
+void MicrosoftMangleContextImpl::mangleCanonicalTypeName(
     QualType T, raw_ostream &Out, bool NormalizeIntegers = false) {
   // This is just a made up unique string for the purposes of tbaa.  undname
   // does *not* know how to demangle it.
   MicrosoftCXXNameMangler Mangler(*this, Out);
   Mangler.getStream() << '?';
-  Mangler.mangleType(T, SourceRange());
+  Mangler.mangleType(T.getCanonicalType(), SourceRange());
----------------
aganea wrote:

Like @mizvekov suggested, we could only backport this line to `release/17.x` with a comment above, pointing to this patch?

https://github.com/llvm/llvm-project/pull/66816