Add missing ssavalue check for hoisting loads

[gbaraldi]

Should fix #48917
We might want to do a PkgEval with Julia and LLVM assertions

[vchuravy]

@nanosoldier runtests(configuration = (buildflags=["LLVM_ASSERTIONS=1", "FORCE_ASSERTIONS=1"],), vs_configuration = (buildflags = ["LLVM_ASSERTIONS=1", "FORCE_ASSERTIONS=1"],))

[nanosoldier]

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[gbaraldi]

I tested some of the failing/timing out tests and they seem to work locally.