[llvm] [NFC]In codegen pipeline, turn static-data-splitter pass on/off with its own option (PR #134752)

[Mingming Liu via llvm-commits]

mingmingl-llvm wrote:

> I think we can simplify this a bit if we move the staticdatapartitioning pass before the machine function splitter. Since no new CFG changes are introduced in the static data splitter pass we can only load the FS profile once before both of these passes.

thanks for the suggestion! Yeah it's indeed much simpler, done.

https://github.com/llvm/llvm-project/pull/134752