Add topologySpreadConstraints to helm chart

This commit adds the ability to use topologySpreadConstraints in the
helm chart by populating either one or both of topologySpreadConstraints
and githubWebhookServer.topologySpreadConstraints values.

See the official docs:
https://kubernetes.io/docs/concepts/workloads/pods/pod-topology-spread-constraints/

Author: Natanande

charts/actions-runner-controller/templates/deployment.yaml

@@ -137,3 +137,7 @@ spec:
       tolerations:
         {{- toYaml . | nindent 8 }}
       {{- end }}
+      {{- with .Values.topologySpreadConstraints }}
+      topologySpreadConstraints:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}

charts/actions-runner-controller/templates/githubwebhook.deployment.yaml

@@ -89,4 +89,8 @@ spec:
       tolerations:
         {{- toYaml . | nindent 8 }}
       {{- end }}
+      {{- with .Values.githubWebhookServer.topologySpreadConstraints }}
+      topologySpreadConstraints:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
 {{- end }}