retain quotes in namespace transformer filter (#4421)

* check tag values for double quoting

* reuse setentry

* don't override single quotes in merge and fix cm generator immutable val

* get rid of comment

* starlark annotation tests

* don't commit test image changes

* set network to bool

* isSet bool

* updating e2e config tool

* leave createtag

* fn command failing unmarshal test

* fn command test

* don't set style in run-fs

* use setentry to set tag

* remove e2e test changes and make IsStringValue an RNode method

kyaml/yaml/rnode.go

@@ -248,6 +248,11 @@ func (rn *RNode) IsNilOrEmpty() bool {
 		IsYNodeZero(rn.YNode())
 }
 
+// IsStringValue is true if the RNode is not nil and is scalar string node
+func (rn *RNode) IsStringValue() bool {
+	return !rn.IsNil() && IsYNodeString(rn.YNode())
+}
+
 // GetMeta returns the ResourceMeta for an RNode
 func (rn *RNode) GetMeta() (ResourceMeta, error) {
 	if IsMissingOrNull(rn) {