add signature functions for approval

integrations/cloud_check.go

@@ -0,0 +1,5 @@
+package integrations
+
+func IsCloud() bool {
+	return false
+}

integrations/peer_validation.go

@@ -0,0 +1,7 @@
+package integrations
+
+import "github.com/netbirdio/netbird/management/server"
+
+func IsPeerAllowedToConnect(peer *server.Peer) bool {
+	return true
+}