fix(action): execute without features set (#11271)

# Which Problems Are Solved

A customer noted that one some of their environments actions were never
executed at all.
During the investigation it was discovered, that these systems did not
have any features set.

# How the Problems Are Solved

Fix the `scanAuthzInstance` function to handle queries without features
returned correctly.

# Additional Changes

None

# Additional Context

- reported through support
- requires backport to v4.x and v3.x

internal/query/instance.go

@@ -599,11 +599,10 @@ func scanAuthzInstance() (*authzInstance, func(row *sql.Row) error) {
 		}
 		instance.CSP.EnableIframeEmbedding = enableIframeEmbedding.Bool
 		instance.Impersonation = enableImpersonation.Bool
-		if len(features) == 0 {
-			return nil
-		}
-		if err = json.Unmarshal(features, &instance.Feature); err != nil {
-			return zerrors.ThrowInternal(err, "QUERY-Po8ki", "Errors.Internal")
+		if len(features) > 0 {
+			if err = json.Unmarshal(features, &instance.Feature); err != nil {
+				return zerrors.ThrowInternal(err, "QUERY-Po8ki", "Errors.Internal")
+			}
 		}
 		if len(executionTargetsBytes) > 0 {
 			var targets []target_domain.Target