[clang-tools-extra] [clang-tidy]bugprone-unused-return-value ignore `++` and `--` operator overloading (PR #84922)

[Congcong Cai via cfe-commits]

HerrCai0907 wrote:

It should be another check in maybe performance, since this check wants to detect unused return instead of iterator.

https://github.com/llvm/llvm-project/pull/84922