Automated test ensuring ResolveDependencies is implemented for all supported object types

[czeslavo]

We should have an automated test that will ensure that all object types store.CacheStores keeps have an explicit switch-case defined in fallback.ResolveDependencies function.

Proposed solution

Rework store.CacheStores and its methods (Get, Add, Delete) to be wholly generated, enforcing a single point of truth for what object kinds it supports. This will allow adding one more "meta" method: SupportedObjectTypes that we will be able to use in the ResolveDependencies test to ensure we have a switch case for every supported type explicitly defined (if there's no case defined, ResolveDependencies should return an error).

[czeslavo]

Done in #6010.