[clang] [Clang][NFC] Refactor operator delete argument handling (PR #160554)

[Andy Kaylor via cfe-commits]

andykaylor wrote:

The changes I made to CIR in https://github.com/llvm/llvm-project/pull/160574 conflict with this. I'm working on a small change to align the CIR code with the refactoring in this PR. I will update as soon as my local build and test finish.

https://github.com/llvm/llvm-project/pull/160554