[llvm] [X86][SimplifyCFG] Support hoisting load/store with conditional faulting (PR #96878)

[Shengchen Kan via llvm-commits]

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+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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KanRobert wrote:

Test (`load_from_gep`) was added.  `arrayidx` is defined in the successor and not a result of load, and we don't hoist the `load` to avoid recursively check the operands.

https://github.com/llvm/llvm-project/pull/96878