[llvm] [AArch64] Don't run loop-idiom-vectorize pass in the O0 pipeline (PR #156802)

[David Green via llvm-commits]

davemgreen wrote:

Can we add a test that checks `-mtriple aarch64 -print-pipeline-passes -O0`? https://godbolt.org/z/Yf8ex6KMh

https://github.com/llvm/llvm-project/pull/156802