[Platform] Platform doesn't check length of region name and on premise config creation fails

[markwjeske]

Trying to create an on prem config in platform and the create failed because one of my region names was too long. Apparently 25 is the maximum.

Here's platform log:

2021-06-16 18:15:00,689 [DEBUG] from SetUniverseKey in application-akka.actor.default-dispatcher-3027 - Running universe key setter
2021-06-16 18:16:10,880 [ERROR] from RegionController in application-akka.actor.default-dispatcher-3030 - Error[ERROR: value too long for type character varying(25)]
2021-06-16 18:16:10,880 [ERROR] from ApiResponse in application-akka.actor.default-dispatcher-3030 - Hit error 500, message: {"error":"Unable to create region: datacenter-azure-washington"}

We should check all this information for issues like this before attempting the create and failing. Otherwise the user is forced to start over and fill in all the information.