Breaking: #64070 - Removed global variable WEBMOUNTS 

See forge#64070

Description 

The global variable WEBMOUNTS has been removed, as the same data from the WEBMOUNTS can always be fetched via $GLOBALS['BE_USER']->returnWebmounts().

Impact 

The variable $GLOBALS['WEBMOUNTS'] will no longer be filled.

Affected installations 

Any installation using $GLOBALS['WEBMOUNTS'] directly within an extension will produce a wrong result.

Migration 

Replace all occurrences of $GLOBALS['WEBMOUNTS'] with $GLOBALS['BE_USER']->returnWebmounts().