[CIR] Upstream support for operator delete

[andykaylor]

Overview

Upstream support for operator delete handling in ClangIR.

Suggested minimal test case

struct A {
  ~A() {}
};
void f(A *a) {
  delete a;
}

Existing incubator tests

clang/test/CIR/CodeGen/delete.cpp

[FantasqueX]

I think this issue can be closed because of #160574