[FIX] Broken download link on uploaded files (#22848)

* switched from rtrim to replace

* removed subdirectory start

* added regex to string.replace

* added regex to string.replace

* proper user of scape regex

* removed logging statement

app/utils/lib/getURL.js

@@ -1,4 +1,5 @@
 import s from 'underscore.string';
+import { escapeRegExp } from '@rocket.chat/string-helpers';
 
 import { isURL } from './isURL';
 import { settings } from '../../settings';
@@ -54,7 +55,7 @@ export const _getURL = (path, { cdn, full, cloud, cloud_route, cloud_params, _cd
 	}
 
 	if (full) {
-		return s.rtrim(siteUrl, pathPrefix) + url;
+		return siteUrl.replace(new RegExp(`${ escapeRegExp(pathPrefix) }$`), '') + url;
 	}
 
 	return url;