Update CLI commands to Notification API v1beta2

Signed-off-by: Stefan Prodan <stefan.prodan@gmail.com>

cmd/flux/testdata/export/alert.yaml

@@ -1,5 +1,5 @@
 ---
-apiVersion: notification.toolkit.fluxcd.io/v1beta1
+apiVersion: notification.toolkit.fluxcd.io/v1beta2
 kind: Alert
 metadata:
   name: flux-system

cmd/flux/testdata/export/objects.yaml

@@ -4,7 +4,7 @@ kind: Namespace
 metadata:
   name: {{ .fluxns }}
 ---
-apiVersion: notification.toolkit.fluxcd.io/v1beta1
+apiVersion: notification.toolkit.fluxcd.io/v1beta2
 kind: Provider
 metadata:
   name: slack
@@ -14,7 +14,7 @@ spec:
   channel: 'A channel with spacess'
   address: https://hooks.slack.com/services/mock
 ---
-apiVersion: notification.toolkit.fluxcd.io/v1beta1
+apiVersion: notification.toolkit.fluxcd.io/v1beta2
 kind: Alert
 metadata:
   name: flux-system
@@ -97,7 +97,7 @@ spec:
   interval: 5m
   prune: true
 ---
-apiVersion: notification.toolkit.fluxcd.io/v1beta1
+apiVersion: notification.toolkit.fluxcd.io/v1beta2
 kind: Receiver
 metadata:
   name: flux-system

cmd/flux/testdata/export/provider.yaml

@@ -1,5 +1,5 @@
 ---
-apiVersion: notification.toolkit.fluxcd.io/v1beta1
+apiVersion: notification.toolkit.fluxcd.io/v1beta2
 kind: Provider
 metadata:
   name: slack
@@ -7,5 +7,6 @@ metadata:
 spec:
   address: https://hooks.slack.com/services/mock
   channel: A channel with spacess
+  interval: 10m0s
   type: slack
 

cmd/flux/testdata/export/receiver.yaml

@@ -1,5 +1,5 @@
 ---
-apiVersion: notification.toolkit.fluxcd.io/v1beta1
+apiVersion: notification.toolkit.fluxcd.io/v1beta2
 kind: Receiver
 metadata:
   name: flux-system
@@ -8,6 +8,7 @@ spec:
   events:
   - ping
   - push
+  interval: 10m0s
   resources:
   - kind: GitRepository
     name: flux-system