Add GitHub Actions to publish helm chart (#257)

* Add chart workflows (#1)

* Add chart workflows

* Fix publishing step in CI

Signed-off-by: David Young <davidy@funkypenguin.co.nz>

* Update CI on push-to-master (#3)

* Put helm installation step in the correct CI job

Signed-off-by: David Young <davidy@funkypenguin.co.nz>

* Put helm installation step in the correct CI job (#4)

* Update on-push-master-publish-chart.yml

* Remove references to certmanager dependency

Signed-off-by: David Young <davidy@funkypenguin.co.nz>

* Add ability to customize kube-rbac-proxy image

Signed-off-by: David Young <davidy@funkypenguin.co.nz>

* Only install cert-manager if we're going to spin up KinD

Signed-off-by: David Young <davidy@funkypenguin.co.nz>

charts/actions-runner-controller/templates/ci-secret.yaml

@@ -0,0 +1,10 @@
+# This template only exists to facilitate CI testing of the chart, since
+# a secret is expected to be found in the namespace by the controller manager
+{{ if .Values.createDummySecret -}}
+apiVersion: v1
+data:
+  github_token: dGVzdA==
+kind: Secret
+metadata:
+  name: controller-manager
+{{- end }}