[GVN] Turn off ScalarPRE for TokenLike Types (#156513)
fixes #154407
In HLSL the GVNPass was adding a phi node on
a target extention type.
https://hlsl.godbolt.org/z/sc14YenEe
This is something we cleaned up in a past PR
(https://github.com/llvm/llvm-project/pull/154620) by introducing
`isTokenLikeTy`. In the case of the GVN pass the target extention type
was still making its way through. This change makes it so if we see this
type we don't do PRE.
