-fsanitize=function: fix MSVC hashing to sugared type (#66816)

Hashing the sugared type instead of the canonical type meant that
a simple example like this would always fail under MSVC:

```
static auto l() {}
int main() {
  auto a = l;
  a();
}
```
`clang --target=x86_64-pc-windows-msvc -fno-exceptions
-fsanitize=function -g -O0 -fuse-ld=lld -o test.exe test.cc`

produces:
```
test.cc:4:3: runtime error: call to function l through pointer to incorrect function type 'void (*)()'
```

1 files changed, 1 insertions, 1 deletions

diff --git a/clang/lib/CodeGen/CodeGenFunction.cpp b/clang/lib/CodeGen/CodeGenFunction.cpp
index 3eb4cb8..9b21f42 100644
--- a/clang/lib/CodeGen/CodeGenFunction.cpp
+++ b/clang/lib/CodeGen/CodeGenFunction.cpp
@@ -576,7 +576,7 @@ CodeGenFunction::getUBSanFunctionTypeHash(QualType Ty) const {
     Ty = getContext().getFunctionTypeWithExceptionSpec(Ty, EST_None);
   std::string Mangled;
   llvm::raw_string_ostream Out(Mangled);
-  CGM.getCXXABI().getMangleContext().mangleTypeName(Ty, Out, false);
+  CGM.getCXXABI().getMangleContext().mangleCanonicalTypeName(Ty, Out, false);
   return llvm::ConstantInt::get(
       CGM.Int32Ty, static_cast<uint32_t>(llvm::xxh3_64bits(Mangled)));
 }