[clang-tools-extra] [clang-tidy] Update llvmlibc-implementation-in-namespace to new rules (PR #66504)

[Guillaume Chatelet via cfe-commits]

gchatelet wrote:

> Should this change be reflected in the Release Notes?

Where would that be? `clang-tools-extra/docs/ReleaseNotes.rst`?
I can't find what the current release notes look like for head.

https://github.com/llvm/llvm-project/pull/66504