Add Remote Development CODEOWNERS

What does this MR do and why?

A tiny MVC for Add CODEOWNERS entries for remote development f... (#408581 - closed) based on our folder config as per Remote Development feature behind a feature flag (!105783 - merged)

New subgroups have been added at: https://gitlab.com/gitlab-org/maintainers/remote-development

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.