[clang] [ItaniumMangle] Use mangleType instead of mangleNameOrStandardSubstitution in mangleCXXCtorVTable function (PR #109970)

[Matheus Izvekov via cfe-commits]

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

LGTM, Thanks!

Can you also add a release note, mentioning the potential ABI breaking change?

Please wait 24h before merging in case the other reviewers want to chime in.

https://github.com/llvm/llvm-project/pull/109970