[llvm] [Support][Casting] Add predicates for `isa*` functions (PR #83753)

[Jakub Kuderski via llvm-commits]

kuhar wrote:

> Should this replace the multiple places in SLPVectorizer.cpp that pass `classof` to all_of/count_if/etc?

@topperc Yes.



https://github.com/llvm/llvm-project/pull/83753