MM-52694: Skip TestRunPostStatusUpdate (#23330)

Racy test failed in master branch.

https://mattermost.atlassian.net/browse/MM-52694
```release-note
NONE
```

server/playbooks/server/api_runs_test.go

@@ -506,6 +506,7 @@ func TestRunRetrieval(t *testing.T) {
 }
 
 func TestRunPostStatusUpdate(t *testing.T) {
+	t.Skip("MM-52694")
 	e := Setup(t)
 	e.CreateBasic()