[clang] [compiler-rt] [llvm] [X86] Sync multiversion cpu subtypes and vendors with libgcc and refactor internal cpu type tables (PR #171172)

[Mikołaj Piróg via cfe-commits]

mikolaj-pirog wrote:

> @mikolaj-pirog are you still working on this?

Yes -- I aim to get back to this before end of the month. I need to rebase and add some basic test (most likely test that values emitted by clang make sense)

https://github.com/llvm/llvm-project/pull/171172