[CodeGen] Port `ShadowStackGCLowering` to new pass manager (#75324)

IIUC the new pass system was designed with parallelism. This pass needs
to add some global variables into the current module, this is not
allowed by

[WritingAnLLVMPass](https://llvm.org/docs/WritingAnLLVMPass.html#the-functionpass-class),
so convert it to module pass, see FIXME in `GetFrameMap`.

Therefore, this will trigger assertion in `CodeGenPassBuilder`:
https://github.com/llvm/llvm-project/blob/effd47ed45e3badd756103346a7c3b9e1e939e5e/llvm/include/llvm/CodeGen/CodeGenPassBuilder.h#L200-L207
Will fix it in future.