[clang-tools-extra] [clang-tidy] 'modernize-use-starts-ends-with': fixed false positives on `find` and `rfind` (PR #129564)

[Baranov Victor via cfe-commits]

vbvictor wrote:

Reverted style changes in `ReleaseNotes.rst`, created new PR for cleanup: https://github.com/llvm/llvm-project/pull/130626.

https://github.com/llvm/llvm-project/pull/129564