[fix 4124] Skip local resource until all transformations have completed.

Resources annotated as "local-config" are expected to be ignored. This skip local resource happens in "accumulateResources" which happens before any transformation operations.
However, the local resource may be needed in transformations.
Thus, this change removes the "drop local resource" logic from accumulateResources and removes these local resource after all transformation operations and var operations are done.

Note:
None of the existing ResMap functions can drop the resource slice easily: "Clear" will ruin the resource order, "AppendAll" only adds non-existing resource, "AbsorbAll" only add or modify but not delete.
Thus, we introduce a new func "Intersection" for resourceAccumulator that specificaly removes the resource by ID and keep the original order.

api/internal/accumulator/resaccumulator.go

@@ -168,3 +168,23 @@ func (ra *ResAccumulator) FixBackReferences() (err error) {
 	return ra.Transform(
 		newNameReferenceTransformer(ra.tConfig.NameReference))
 }
+
+// Intersection drops the resources which "other" does not have.
+func (ra *ResAccumulator) Intersection(other resmap.ResMap) error {
+	for _, curId := range ra.resMap.AllIds() {
+		toDelete := true
+		for _, otherId := range other.AllIds() {
+			if otherId == curId {
+				toDelete = false
+				break
+			}
+		}
+		if toDelete {
+			err := ra.resMap.Remove(curId)
+			if err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}