Adds a new streamstore controller for fault.Errors. This provides large scale, extensible file storage for fault errors to be persisted, much like we do for backup details. --- #### Does this PR need a docs update or release note? - [x] ⛔ No #### Type of change - [x] 🌻 Feature #### Issue(s) * #2708 #### Test Plan - [x] 💚 E2E