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

[Utkarsh Saxena via cfe-commits]

usx95 wrote:

I would wait for approvals from reviewers who have commented so far. cc: @vbvictor @steakhal 

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