[NewPM][opt] Run the "default" AA pipeline by default
We tend to assume that the AA pipeline is by default the default AA
pipeline and it's confusing when it's empty instead.
Initially reverted due to BasicAA running analyses in an unspecified
order (multiple function calls as parameters), fixed by fetching
analyses before the call to construct BasicAA.
Reviewed By: asbirlea
Differential Revision: https://reviews.llvm.org/D95117