VOL-4904 - openonu python adapter

Makefile
--------
  o Added helper targets for running lint-helm and lint-chart locally.

README.md
---------
  o Replace legacy text for python openonu adapter with links to
    newer golang adapter

voltha-infra/Chart.yaml
-----------------------
  o Bump etcd and kafka chart versions to the latest available to fix a
    helm linting problem reported by jenkins.  Version edits were applied
    by an earlier job but not clear at the time if the correct vesrion(s)
    were applied.

misc/
=====
   o Update more copyright notices to 2023 forcing a jenkins job.

VERSION
=======
   o Revert VERSION file to 3.2.1, must have bumped it as part of splitting a pull request.

voltha-infra/Chart.yaml
-----------------------
   o Chart is dependent on votha/ so bump version string to try and correct jenkins job failure.
   o Update copyright notice.

Add a few more copyright changes to sanity check the build again.

Change-Id: I4e4498a001a911114f5f8ba34a8b51e765f94a73
diff --git a/Makefile b/Makefile
index a5ca425..fcecb6f 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 # -*- makefile -*-
 # -----------------------------------------------------------------------
-# Copyright 2021-2022 Open Networking Foundation (ONF) and the ONF Contributors
+# Copyright 2021-2023 Open Networking Foundation (ONF) and the ONF Contributors
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -75,6 +75,15 @@
 helm-repo-tools:
 	git clone "https://gerrit.opencord.org/helm-repo-tools"
 
+lint-local: lint-helm lint-chart
+
+lint-helm:
+	helm-repo-tools/helmlint.sh
+
+lint-chart:
+	helm-repo-tools/chart_version_check.sh
+#	helm-repo-tools/lchart_version_check.sh
+
 ## -----------------------------------------------------------------------
 ## -----------------------------------------------------------------------
 # test-all += test-tags # tagcollisionreject + curl is broken