[llvm] [SROA] Unify the names of new instructions created in SROA. (PR #167917)

[Shubham Sandeep Rastogi via llvm-commits]

rastogishubham wrote:

Since there is no update from @aeubanks , I am going to put this patch in for now, feel free to revert it, but it is a very minor change that doesn't hurt anything too much

https://github.com/llvm/llvm-project/pull/167917