[clang-tools-extra] [clang-tidy][NFC] Enable `readability-container-contains` check in clang-tidy config and apply fix-its (PR #157123)

[Baranov Victor via cfe-commits]

vbvictor wrote:

> Note that this check currently has false negatives on strings.

I guess this doesn't hold us back from enabling this check given it's a false-negative.

https://github.com/llvm/llvm-project/pull/157123