Breaking: #98487 - $GLOBALS['PAGES_TYPES'] removed

See forge#98487

Description

The global array PAGES_TYPES has been removed in favor of a new registry class containing the shared state.

Impact

Accessing or modifying $GLOBALS['PAGES_TYPES'] will have no effect anymore.

Affected installations

TYPO3 installations with custom extensions creating custom TCA records or custom Page Doktypes.

Migration

Use the new PageTypeRegistry class to register custom page types with their dependency what kind of records should be allowed for creation, or to read the information what record types are allowed on a specific pages.doktype.