Set ResolvedRefs condition to true on HTTPRoutes (#645)

Previously, the ResolvedRefs condition was only set to False on HTTPRoutes
when one or more references could not be resolved. With this commit,
ResolvedRefs will be set to true when all references are resolved.

Author: kate-osborn

docs/gateway-api-compatibility.md

@@ -99,6 +99,13 @@ Fields:
 	* `conditions` - partially supported. Supported (Condition/Status/Reason):
     	*  `Accepted/True/Accepted`
     	*  `Accepted/False/NoMatchingListenerHostname`
+        *  `Accepted/False/UnsupportedValue`: Custom reason for when the HTTPRoute includes an invalid or unsupported value.
+        *  `Accepted/False/InvalidListener`: Custom reason for when the HTTPRoute references an invalid listener.
+        *  `ResolvedRefs/True/ResolvedRefs`
+        *  `ResolvedRefs/False/InvalidKind`
+        *  `ResolvedRefs/False/RefNotPermitted`
+        *  `ResolvedRefs/False/BackendNotFound`
+        *  `ResolvedRefs/False/UnsupportedValue`: Custom reason for when one of the HTTPRoute rules has a backendRef with an unsupported value.
 
 ### TLSRoute
 

internal/state/change_processor_test.go

@@ -342,13 +342,15 @@ var _ = Describe("ChangeProcessor", func() {
 											SectionName:   helpers.GetPointer[v1beta1.SectionName]("listener-80-1"),
 											Conditions: []conditions.Condition{
 												conditions.NewRouteInvalidListener(),
+												conditions.NewRouteResolvedRefs(),
 											},
 										},
 										{
 											GatewayNsName: client.ObjectKeyFromObject(gw1),
 											SectionName:   helpers.GetPointer[v1beta1.SectionName]("listener-443-1"),
 											Conditions: []conditions.Condition{
 												conditions.NewRouteInvalidListener(),
+												conditions.NewRouteResolvedRefs(),
 											},
 										},
 									},

internal/state/conditions/conditions.go

@@ -68,6 +68,7 @@ func DeduplicateConditions(conds []Condition) []Condition {
 func NewDefaultRouteConditions() []Condition {
 	return []Condition{
 		NewRouteAccepted(),
+		NewRouteResolvedRefs(),
 	}
 }
 
@@ -294,6 +295,16 @@ func NewRouteBackendRefUnsupportedValue(msg string) Condition {
 	}
 }
 
+// NewRouteResolvedRefs returns a Condition that indicates that all the references on the Route are resolved.
+func NewRouteResolvedRefs() Condition {
+	return Condition{
+		Type:    string(v1beta1.RouteConditionResolvedRefs),
+		Status:  metav1.ConditionTrue,
+		Reason:  string(v1beta1.RouteReasonResolvedRefs),
+		Message: "All references are resolved",
+	}
+}
+
 // NewGatewayClassInvalidParameters returns a Condition that indicates that the GatewayClass has invalid parameters.
 func NewGatewayClassInvalidParameters(msg string) Condition {
 	return Condition{