[clang] [Clang] Emit type metadata on vtables when IRPGO instrumentation option is on. (PR #70841)

[Teresa Johnson via cfe-commits]

https://github.com/teresajohnson approved this pull request.

Somehow I missed those other uses of the ITANIUM prefix. Thanks for cleaning it up though I think the new names are more descriptive.

https://github.com/llvm/llvm-project/pull/70841