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

[Bruno De Fraine via llvm-commits]

brunodf-snps wrote:

Thanks for committing. main has a new test since my branch point llvm/test/Analysis/BasicAA/separate_storage-alias-sets.ll
that is failing, let me fix that.

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