[MM-56073] MMCTL delete post command (#27539)

Co-authored-by: Ben Schumacher <ben.schumacher@mattermost.com>

e2e-tests/cypress/tests/integration/channels/messaging/message_deletion_spec.js

@@ -1,6 +1,8 @@
 // Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
 // See LICENSE.txt for license information.
 
+import {getAdminAccount} from 'tests/support/env';
+
 // ***************************************************************
 // - [#] indicates a test step (e.g. # Go to a page)
 // - [*] indicates an assertion (e.g. * Check the title)
@@ -8,10 +10,16 @@
 // ***************************************************************
 
 // Stage: @prod
-// Group: @channels @messaging
+// Group: @channels @deleting_messages
 
 describe('Message deletion', () => {
     before(() => {
+        cy.apiUpdateConfig({
+            ServiceSettings: {
+                EnableAPIPostDeletion: true,
+            },
+        });
+
         // # Login as test user and visit off-topic
         cy.apiInitSetup({loginAfter: true}).then(({offTopicUrl}) => {
             cy.visit(offTopicUrl);
@@ -70,4 +78,17 @@ describe('Message deletion', () => {
             });
         });
     });
+
+    it('Permanently delete a post and ensure it\'s reflected in the UI', () => {
+        // # Post message in center.
+        cy.postMessage('test message deletion');
+
+        cy.getLastPostId().then((parentMessageId) => {
+            const admin = getAdminAccount();
+
+            cy.apiDeletePost(parentMessageId, admin, true);
+
+            cy.get(`#post_${parentMessageId}`).should('contain', '(message deleted)');
+        });
+    });
 });