Accept dots in project name in project templates endpoint
What does this MR do?
In 2da33538 we change almost all endpoints to support dots inside the project name (and namespace) in the API.
The project templates API endpoints didn't get this update and, unless the project is urlencoded, if the project has dots the endpoint will return a 404.
Refs #215906 (closed)
Does this MR meet the acceptance criteria?
Conformity
Edited by Francisco Javier López (ex-Gitlab)