Add a ChatOps command to kick off the internal release process

Context

Remediating GiLab SaaS single-tenant instances, like GitLab Dedicated, within remediation SLAs requires introducing a new GitLab release strategy: Internal Releases. This release will generate private packages to be delivered to GitLab SaaS single-tenant instances without initiating a patch.

As with any other GitLab release process, release managers need a way to kick in an internal release process

Introduce a new ChatOps command to kick in the internal release

Similar to the patch release command:

/chatops run release prepare --security 

Ideally the above patch should be /chatops run release patch

A new ChatOps command should be implemented to kick an internal release.

/chatops run release internal

For starters, the command will be a no-op, later it will be expanded to trigger the creation of a release/task