[llvm] [LV][CSSPGO] Don't let pseudo probes block early-exit vectorization (PR #220149)

[chandan singh via llvm-commits]

chandankds wrote:

Split the LangRef change into a separate docs PR: https://github.com/llvm/llvm-project/pull/223211

`llvm.pseudoprobe` is IR/CSSPGO semantics rather than Loop Vectorize policy, so it should not live in this `[LV]` patch. This PR now only has the vectorizer skip plus the VPlan `m_Intrinsic` match.

https://github.com/llvm/llvm-project/pull/220149