feat(stacks): scope stack names to endpoint (#4520) (#212)

* refactor(stack): create unique name function

* refactor(stack): change stack resource control id

* feat(stacks): validate stack unique name in endpoint

* feat(stacks): prevent name collision with external stacks

* refactor(stacks): move resource id util

* refactor(stacks): supply resource id util with name and endpoint

* fix(docker): calculate swarm resource id

* feat(stack): prevent migration if stack name already exist

* feat(authorization): use stackutils

api/internal/stackutils/stackutils.go

@@ -0,0 +1,12 @@
+package stackutils
+
+import (
+	"fmt"
+
+	portainer "github.com/portainer/portainer/api"
+)
+
+// ResourceControlID returns the stack resource control id
+func ResourceControlID(endpointID portainer.EndpointID, name string) string {
+	return fmt.Sprintf("%d_%s", endpointID, name)
+}