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

[via cfe-commits]

flovent wrote:

> @flovent, I believe you can file a request to grant commit access for LLVM (and become a member) if you wish.
See label:infra:commit-access-request in issues.

Thanks for the tip! i just file one #157214.


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