[clang-tools-extra] Rename CODE_OWNERS -> Maintainers (PR #114544)

[Aaron Ballman via cfe-commits]

AaronBallman wrote:

> > @PiotrZSL The ping was in case you want to be added as a maintainer to clang-tidy as well. I’m mentioning it just to make sure.
> 
> The designation of "maintainer" does not impact the established process.

It does -- it helps newcomers figure out who can help them with reviews, answering questions, etc.

> This role primarily introduces additional responsibilities without offering any demonstrable advantages.

The only advantage to the maintainer is to get published credit for their increased responsibilities in the community, which isn't an advantage for everyone. The primary advantage is for the community.

> It is likely to become dead in the near future, mirroring the fate of the code owner role. 

The project has had this same concept in some form or fashion for at least 15 years now, so I don't think this is an accurate view.

> At the end, being or not being a maintainer has no impact on me.

There's no pressure to sign up to be one, but having a dedicated group of listed, active maintainers makes it more likely the project will thrive. FWIW, projects without active maintainers are starting to be removed or subsumed and I expect we'll continue to do that into the future.

https://github.com/llvm/llvm-project/pull/114544