[clang] [CIR] Fix reference alignment to use pointee type (PR #186667)

[Erich Keane via cfe-commits]

https://github.com/erichkeane requested changes to this pull request.

Can you convince me this is the right change?  We're agreeing with classic-codegen on all the examples, and this patch makes that no longer true.  We should be agreeing with classic-codegen.

https://github.com/llvm/llvm-project/pull/186667