[clang] [ubsan] Remove -fsanitizer=vptr from -fsanitizer=undefined (PR #121115)

[Vitaly Buka via cfe-commits]

vitalybuka wrote:

@AaronBallman @zygoloid
Looks like we agree on https://discourse.llvm.org/t/rfc-remove-vptr-from-undefined/83830
So I'd  like to merge this patch this week.

https://github.com/llvm/llvm-project/pull/121115