[llvm] [AArch64] Enable "sink-and-fold" in MachineSink by default (PR #67432)

[Francesco Petrogalli via llvm-commits]

fpetrogalli wrote:

@momchil-velikov - I cannot find the comment I have attached to one of the commits in this PR. Just to make sure the information is not lost, I am letting you know that this PR seems to be breaking one of the public bots https://green.lab.llvm.org/green/job/clang-stage1-RA/35786/



https://github.com/llvm/llvm-project/pull/67432