[4.0] Enable utf8mb4 connections for mysql adapters on installation#25292

wilsonge merged 2 commits intojoomla:4.0-devjoomla/joomla-cms:4.0-devfrom

richard67:4.0-dev-fix-utf8mb4-for-mysql-pdorichard67/joomla-cms:4.0-dev-fix-utf8mb4-for-mysql-pdoCopy head branch name to clipboard