[clang-tools-extra] [clang-tools-extra] Apply modernize-use-string-view to the code (PR #179514)

[Zinovy Nis via cfe-commits]

irishrover wrote:

Thanks for your feedback.
So 1) Remove any non-clang-tidy files from this PR and 2) create separate PRs for all other products?

https://github.com/llvm/llvm-project/pull/179514