[clang] [clang] Skip auto-init on scalar vars that have a non-constant Init and no self-ref (PR #94642)

[Alexander Potapenko via cfe-commits]

ramosian-glider wrote:

Drive-by comment: can you please either merge the two commits together, or change their descriptions so that they are not 100% identical?

https://github.com/llvm/llvm-project/pull/94642