fix: nil pointer on create instance add machine (#6000)

* fix: nil pointer on create instance add machine

* fix: instance setup with machine user pat

* fix: correct logic to write pat and key from setup without configurable scope

---------

Co-authored-by: Livio Spring <livio.a@gmail.com>

cmd/setup/steps.yaml

@@ -1,5 +1,6 @@
 FirstInstance:
   MachineKeyPath:
+  PatPath:
   InstanceName: ZITADEL
   DefaultLanguage: en
   Org:
@@ -30,6 +31,8 @@ FirstInstance:
       MachineKey:
         ExpirationDate:
         Type:
+      Pat:
+        ExpirationDate:
 
 CorrectCreationDate:
   FailAfter: 5m