Playwright upgrade and small addition to ChannelsPage helper (#22978)

* partial commit

* upgrade playwright to 1.32.3 (ui + project dependencies support)

* revert empty line

---------

Co-authored-by: Mattermost Build <build@mattermost.com>

e2e-tests/playwright/support/ui/pages/channels.ts

@@ -49,6 +49,10 @@ export default class ChannelsPage {
         await this.postCreate.postMessage(message);
     }
 
+    async sendMessage() {
+        await this.postCreate.sendMessage();
+    }
+
     async getFirstPost() {
         await this.page.getByTestId('postView').first().waitFor();
         const post = await this.page.getByTestId('postView').first();