Add a button in the admin panel to check OT&E status of a registrar

For now, it only displays a status of "Passed: true|false" or an error message in simple text. In further work we will make the UI nicer.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=229971564

java/google/registry/ui/soy/registrar/AdminSettings.soy

@@ -14,8 +14,6 @@
 
 {namespace registry.soy.registrar.admin}
 
-
-
 /** Registrar admin settings page for view and edit. */
 {template .settings}
   {@param allowedTlds: list<string>}
@@ -48,6 +46,9 @@
           <label class="{css('setting-label')}">OT&amp;E setup page</label>
         <td class="{css('setting')}">
           <p>Generate new OT&amp;E accounts <a href="/registrar-ote-setup">here</a>
+          </p></td>
+      </tr>
+      {call .oteStatus /}
     </table>
   </form>
 {/template}
@@ -64,3 +65,17 @@
     <input name="{$name}" value="{$tld}" readonly>
   </div>
 {/template}
+
+{template .oteStatus}
+  <tr class="{css('kd-settings-pane-section')}">
+    <td class="{css('setting')}">
+      <button
+          type="button"
+          id="btn-ote-status"
+          value="Check OT&amp;E status"
+          class="{css('kd-button')} {css('kd-button-submit')}">Check OT&amp;E status
+      </button>
+    </td>
+    <td id="ote-status-area-parent" class="{css('setting')}"></td>
+  </tr>
+{/template}