[Refactor] Internalize konfig constants

This PR is an effort towards internalizing public APIs.
It moves some of the builtinconstants to internal/

Signed-off-by: Varsha Prasad Narsing <varshaprasad96@gmail.com>

api/internal/konfig/builtinpluginconsts/defaultconfig.go

@@ -0,0 +1,42 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package builtinpluginconsts
+
+import (
+	"bytes"
+)
+
+// GetDefaultFieldSpecs returns default fieldSpecs.
+func GetDefaultFieldSpecs() []byte {
+	configData := [][]byte{
+		[]byte(namePrefixFieldSpecs),
+		[]byte(nameSuffixFieldSpecs),
+		[]byte(commonLabelFieldSpecs),
+		[]byte(templateLabelFieldSpecs),
+		[]byte(commonAnnotationFieldSpecs),
+		[]byte(namespaceFieldSpecs),
+		[]byte(varReferenceFieldSpecs),
+		[]byte(nameReferenceFieldSpecs),
+		[]byte(imagesFieldSpecs),
+		[]byte(replicasFieldSpecs),
+	}
+	return bytes.Join(configData, []byte("\n"))
+}
+
+// GetDefaultFieldSpecsAsMap returns default fieldSpecs
+// as a string->string map.
+func GetDefaultFieldSpecsAsMap() map[string]string {
+	result := make(map[string]string)
+	result["nameprefix"] = namePrefixFieldSpecs
+	result["namesuffix"] = nameSuffixFieldSpecs
+	result["commonlabels"] = commonLabelFieldSpecs
+	result["templatelabels"] = templateLabelFieldSpecs
+	result["commonannotations"] = commonAnnotationFieldSpecs
+	result["namespace"] = namespaceFieldSpecs
+	result["varreference"] = varReferenceFieldSpecs
+	result["namereference"] = nameReferenceFieldSpecs
+	result["images"] = imagesFieldSpecs
+	result["replicas"] = replicasFieldSpecs
+	return result
+}