[llvm] [CodeGen] Avoid MachineModuleInfo in MachineModuleSlotTracker (PR #140530)

[Matt Arsenault via llvm-commits]

arsenm wrote:

> In NPM, MMI is not used to store machine functions so we need to use the analysis manager here.

This sounds broken. MachineModuleInfo is supposed to merely be the map from Function to MachineFunction. The NewPM (and other PM-less uses) should still use it 

https://github.com/llvm/llvm-project/pull/140530