[polly] [llvm] [AST] Don't merge memory locations in AliasSetTracker (PR #65731)

[Bruno De Fraine via llvm-commits]

brunodf-snps wrote:

Apart from updating the method names and comments (which is the reason why I still keep the PR marked as draft), I think I have now addressed all of the comments up to this point.

https://github.com/llvm/llvm-project/pull/65731