Website: WP Cloud: Relay secrets for error logger

[brandonpayton]

What is this PR doing?

This PR updates our WP Cloud hosting setup to provide secrets necessary for error logging to WP.org Slack.

Testing Instructions

I tested manually playground-dot-wordpress-dot-net.atomicsites.blog via dev tools console, since the Playground error dialog is hardcoded to log to playground.wordpress.net.

fd = new FormData; fd.append('description', 'PLEASE IGNORE: This is a test.'); fd.append('logs', 'test-logs'); fd.append('url', 'https://playground-dot-wordpress-dot-net.atomicsites.blog/'); fd.append('context', 'test-context'); fd.append('blueprint', 'test-blueprint'); fetch( '/logger.php', { method: 'POST', body: fd } ).then(r => (console.log('logging response', r), r.text())).then( t => console.log('text', t) ) // Results: Promise {<pending>} logging response Response {type: 'basic', url: 'https://playground-dot-wordpress-dot-net.atomicsites.blog/logger.php', redirected: false, status: 200, ok: true, …} text {"ok":true} 

And a message was logged to WP.org Slack here:
https://wordpress.slack.com/archives/C06Q5DCKZ3L/p1714150218128469