[PM/AA] Simplify the AliasAnalysis interface by removing a wrapper

around a DataLayout interface in favor of directly querying DataLayout.

This wrapper specifically helped handle the case where this no
DataLayout, but LLVM now requires it simplifynig all of this. I've
updated callers to directly query DataLayout. This in turn exposed
a bunch of places where we should have DataLayout readily available but
don't which I've fixed. This then in turn exposed that we were passing
DataLayout around in a bunch of arguments rather than making it readily
available so I've also fixed that.

No functionality changed.

llvm-svn: 244189