Add two missing bot settings to default.json (#10867)

* Add two missing bot settings to default.json

`DisableBotsWhenOwnerIsDeactivated` was added to model/config.go by 06b579d18a (diff-2279f86634da3f787f279961af76713a)

`EnableBotAccountCreation` was added to model/config.go by 30061df036 (diff-2279f86634da3f787f279961af76713a)

* Update default.json

* Update diagnostics_test.go

* Revert accidental commit

config/default.json

@@ -77,7 +77,9 @@
         "DisableLegacyMFA": true,
         "EnableEmailInvitations": false,
         "ExperimentalLdapGroupSync": false,
-        "ExperimentalStrictCSRFEnforcement": false
+        "ExperimentalStrictCSRFEnforcement": false,
+        "CreateBotAccounts": false,
+        "DisableBotsWhenOwnerIsDeactivated": true
     },
     "TeamSettings": {
         "SiteName": "Mattermost",