[clang-tools-extra] [clang-tidy] Address false positives in misc-redundant-expression checker (PR #122841)

[Congcong Cai via cfe-commits]

https://github.com/HerrCai0907 approved this pull request.

lgtm.
could you test the case
＃define MACRO "bbb"
"aaa" MACRO == "aaabbb"

https://github.com/llvm/llvm-project/pull/122841