[clang] [Clang] Enable -fpointer-tbaa by default. (PR #117244)

[Aaron Ballman via cfe-commits]

AaronBallman wrote:

> ping :) @AaronBallman WDYT re making this clear in the release notes (also that there's an easy way to disable) + the ongoing work in parallel for the type sanitizer?

I think it's a reasonable experiment to try.

I would call it a potentially breaking change because it's possible this will quietly change code behavior, though.

https://github.com/llvm/llvm-project/pull/117244