[clang-tools-extra] [lldb] [llvm] Apply modernize-use-starts-ends-with on llvm-project (PR #89140)

[Nicolas van Kempen via cfe-commits]

nicovank wrote:

Maybe @kazutakahirata (or anyone else) can stamp the minor `clang-doc` change?

I don't have commit access, feel free to hit merge when everything is in order 👍 .

https://github.com/llvm/llvm-project/pull/89140