Changes to folder structure to allow multigroups and changed go mod name (#2105)

* Changed folder structure to allow multi group registration

* included actions.github.com directory for resources and controllers

* updated go module to actions/actions-runner-controller

* publish arc packages under actions-runner-controller

* Update charts/actions-runner-controller/docs/UPGRADING.md

Co-authored-by: Yusuke Kuoka <ykuoka@gmail.com>

controllers/actions.summerwind.net/utils.go

@@ -0,0 +1,13 @@
+package controllers
+
+func filterLabels(labels map[string]string, filter string) map[string]string {
+	filtered := map[string]string{}
+
+	for k, v := range labels {
+		if k != filter {
+			filtered[k] = v
+		}
+	}
+
+	return filtered
+}