permadiff for failover_policy (#5280) (#10316)

Signed-off-by: Modular Magician <[email protected]>

Author: modular-magician

.changelog/5280.txt

@@ -0,0 +1,3 @@
+```release-note:bug
+compute: fixed permadiff for `failover_policy` on `google_compute_region_backend_service`
+```

google/resource_compute_region_backend_service.go

@@ -3195,14 +3195,14 @@ func expandComputeRegionBackendServiceFailoverPolicy(v interface{}, d TerraformR
 	transformedDisableConnectionDrainOnFailover, err := expandComputeRegionBackendServiceFailoverPolicyDisableConnectionDrainOnFailover(original["disable_connection_drain_on_failover"], d, config)
 	if err != nil {
 		return nil, err
-	} else if val := reflect.ValueOf(transformedDisableConnectionDrainOnFailover); val.IsValid() && !isEmptyValue(val) {
+	} else {
 		transformed["disableConnectionDrainOnFailover"] = transformedDisableConnectionDrainOnFailover
 	}
 
 	transformedDropTrafficIfUnhealthy, err := expandComputeRegionBackendServiceFailoverPolicyDropTrafficIfUnhealthy(original["drop_traffic_if_unhealthy"], d, config)
 	if err != nil {
 		return nil, err
-	} else if val := reflect.ValueOf(transformedDropTrafficIfUnhealthy); val.IsValid() && !isEmptyValue(val) {
+	} else {
 		transformed["dropTrafficIfUnhealthy"] = transformedDropTrafficIfUnhealthy
 	}