[clang-tools-extra] [clang-tidy] Enhance container-data-pointer-check to suggest `c_str` for consts (PR #190590)

[Gaurav Dhingra via cfe-commits]

gxyd wrote:

I had to do a rebase onto main (let me know if it's forbidden or not encouraged by LLVM standards), because there was a merge-conflict in ReleaseNotes.rst file, which I just fixed now.

https://github.com/llvm/llvm-project/pull/190590