[clang] [clang][CFG] Sequence RHS before LHS for overloaded assignment operators in CFG to match C++17 rules (PR #181113)

[Alex Wang via cfe-commits]

aeft wrote:

Here is my analysis: https://github.com/llvm/llvm-project/issues/180521#issuecomment-3889577997

https://github.com/llvm/llvm-project/pull/181113