[llvm] [CodeGen] Avoid sinking EH pad blocks (PR #224812)

[Trung Nguyen via llvm-commits]

trungnt2910 wrote:

Thanks for the quick review!

I simplified the test and used the standard script to generate the `# CHECK` lines.

This is the first time I touched MIR tests (before I worked with C and IR tests), sorry for the slips 😅 

https://github.com/llvm/llvm-project/pull/224812