[TASK] Move all TCA related stuff to TCA files

Configuration/TCA/tx_randombanners_domain_model_banner.php

 <?php
 defined('TYPO3_MODE') or die();
 
+\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::allowTableOnStandardPages('tx_randombanners_domain_model_banner');
+
 return [
     'ctrl' => [
         'title' => 'LLL:EXT:randombanners/Resources/Private/Language/locallang_db.xlf:tx_randombanners_domain_model_banner',

ext_tables.php

-<?php
-defined('TYPO3_MODE') || die();
-
-\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::allowTableOnStandardPages('tx_randombanners_domain_model_banner');