[llvm] [InstCombine] Combine ptrauth intrin. callee into same-key bundle. (PR #94707)

[Daniil Kovalev via llvm-commits]

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+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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kovdan01 wrote:

It's probably worth adding test cases for mismatching ptrauth parameters (key, discriminator, address discrimination) to ensure that combining is not performed when the parameters do not match. I like the approach for tests which is used in your other PR #94706.

https://github.com/llvm/llvm-project/pull/94707