[VOL-5020] Update helm charts for repo:voltha-tracing

voltha-tracing/templates/_helpers.tpl
voltha-tracing/templates/jaeger-deploy.yaml
voltha-tracing/templates/tracing-agent-svc.yaml
voltha-tracing/templates/tracing-gui-svc.yaml
voltha-tracing/values.yaml
voltha/templates/_helpers.tpl
voltha/templates/api-svc.yaml
voltha/templates/core-deploy.yaml
voltha/templates/core-profile-svc.yaml
voltha/templates/core-svc.yaml
voltha/templates/ingress.yaml
voltha/templates/ofagent-deploy.yaml
voltha/templates/ofagent-profile-svc.yaml
-----------------------------------------
  o Update copyright notice ending date.

voltha-tracing/Chart.yaml
voltha-infra/Chart.yaml
-----------------------
  o Update voltha-tracing chart version to 2.12.1

voltha-stack/Chart.yaml
-----------------------
  o Update dependent voltha chart version to v2.12.15

voltha/Chart.yaml
-----------------
  o Increment as a dependency induced by indirect chart deps
    voltha-infra/Chart.yaml and voltha-stack/Chart.yaml.

Change-Id: I12e25e0348b320176ab8a409cc64c00f428f1aec
diff --git a/voltha-tracing/Chart.yaml b/voltha-tracing/Chart.yaml
index 008b7a9..ef2c6a0 100644
--- a/voltha-tracing/Chart.yaml
+++ b/voltha-tracing/Chart.yaml
@@ -1,4 +1,4 @@
-# Copyright 2020-2023 Open Networking Foundation (ONF) and the ONF Contributors
+# Copyright 2020-2024 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.
@@ -14,7 +14,11 @@
 ---
 apiVersion: v1
 name: "voltha-tracing"
-version: "2.12.0"
+
+## Chart version for package:
+##   Increment when Chart.yaml changes
+version: "2.12.1"
+
 description: "A Helm chart for deploying Jaeger all-in-one container for Trace data collection and analysis"
 keywords:
   - "onf"