feat(cache): organization (#8903)

# Which Problems Are Solved

Organizations are ofter searched for by ID or primary domain. This
results in many redundant queries, resulting in a performance impact.

# How the Problems Are Solved

Cache Organizaion objects by ID and primary domain.

# Additional Changes

- Adjust integration test config to use all types of cache.
- Adjust integration test lifetimes so the pruner has something to do
while the tests run.

# Additional Context

- Closes #8865
- After #8902

internal/query/instance.go

@@ -522,9 +522,9 @@ func (i *authzInstance) Keys(index instanceIndex) []string {
 		return []string{i.ID}
 	case instanceIndexByHost:
 		return i.ExternalDomains
-	default:
-		return nil
+	case instanceIndexUnspecified:
 	}
+	return nil
 }
 
 func scanAuthzInstance() (*authzInstance, func(row *sql.Row) error) {