Persist creater of environments
Problem
Currently, In GitLab Environment feature, we don't record who created the environment. This slightly causes a problem on permission model that, we cannot properly evaluate user permission whether the user in question can update the environment, create a deployment on the environment, etc.
This is especially problematic on #22513 (closed) context.
Proposal
Persist user who created the environment.
Related
Edited by Shinya Maeda