Feature: #108557 - TCA option allowedRecordTypes for page types 

See forge#108557

Description 

A new TCA option allowedRecordTypes is introduced for page types to configure which database tables are allowed for specific types (doktype).

EXT:my_extension/Configuration/TCA/Overrides/pages.php 
// Allow any record on that page type.
$GLOBALS['TCA']['pages']['types']['116']['allowedRecordTypes'] = ['*'];

// Allow only specific tables on that page type.
$GLOBALS['TCA']['pages']['types']['116']['allowedRecordTypes'] = [
    'tt_content',
    'my_custom_record',
];
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The array can contain a list of table names or a single asterisk entry (*) to allow all record types.

By default, only the tables pages, sys_category, sys_file_reference, and sys_file_collection are allowed if this option is not overridden.

The defaults are extended if TCA tables enable the option ctrl.security.ignorePageTypeRestriction. Again, this is not considered if allowedRecordTypes is set. These tables must then also be configured there.

Impact 

The allowed record types for pages can now be configured in TCA. This centralizes the configuration for page types and further reduces the need for ext_tables.php, which was used previously.