chore: add firewall rule to allow cluster machines to push to other machines unregistry

internal/machine/firewall/iptables_darwin.go

@@ -1,9 +1,12 @@
 package firewall
 
-import "fmt"
+import (
+	"fmt"
+	"net/netip"
+)
 
 // ConfigureIptablesChains is a stub for Darwin.
-func ConfigureIptablesChains() error {
+func ConfigureIptablesChains(machineIP netip.Addr) error {
 	return fmt.Errorf("not supported on Darwin")
 }