chore: adding refchart migration (#6007)

* adding refchart migration

* added helm chart templates

---------

Co-authored-by: Badal Kumar Prusty <[email protected]>

Author: badal773

scripts/devtron-reference-helm-charts/deployment-chart_4-20-0/.helmignore

@@ -0,0 +1,22 @@
+# Patterns to ignore when building packages.
+# This supports shell glob matching, relative path matching, and
+# negation (prefixed with !). Only one pattern per line.
+.DS_Store
+# Common VCS dirs
+.git/
+.gitignore
+.bzr/
+.bzrignore
+.hg/
+.hgignore
+.svn/
+# Common backup files
+*.swp
+*.bak
+*.tmp
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj
+.vscode/

scripts/devtron-reference-helm-charts/deployment-chart_4-20-0/.image_descriptor_template.json

@@ -0,0 +1 @@
+{"server":{"deployment":{"image_tag":"{{.Tag}}","image":"{{.Name}}"}},"pipelineName": "{{.PipelineName}}","releaseVersion":"{{.ReleaseVersion}}","deploymentType": "{{.DeploymentType}}", "app": "{{.App}}", "env": "{{.Env}}", "appMetrics": {{.AppMetrics}}}

scripts/devtron-reference-helm-charts/deployment-chart_4-20-0/Chart.yaml

@@ -0,0 +1,5 @@
+apiVersion: v1
+appVersion: "1.0"
+description: A Helm chart for Kubernetes
+name: deployment-chart_4-20-0
+version: 4.20.0