[llvm] [ARM] Fix -mno-omit-leaf-frame-pointer flag doesn't works on 32-bit ARM (PR #109628)

[Eli Friedman via llvm-commits]

efriedma-quic wrote:

> Lastly, I'm not sure why so many existing tests were changed from frame-pointer=all to frame-pointer=none

I think the issue here is that the function attributes were requesting a frame pointer, but the CHECK lines check that there isn't one.  So the tests need to be fixed one way or the other.  Changing the attribute seems like the least invasive fix.

https://github.com/llvm/llvm-project/pull/109628