[llvm] [X86][test] Add -combiner-topological-sorting to X86 CodeGen tests (NFC) (PR #189947)

[Simon Pilgrim via llvm-commits]

RKSimon wrote:

This isn't what I had in mind - the -combiner-topological-sorting flag is for traige, not to end up long term in the committed tests - just add a useTopologicalSorting override to X86, regenerate the changed files and then start triaging the (many, many) regressions - either raise subissues attached to the meta or fix it immediately so its OK with+without topological sorting.

I have a similar branch that I'm chewing through here: https://github.com/RKSimon/llvm-project/tree/perf/topological-dag-x86

https://github.com/llvm/llvm-project/pull/189947