Add Symfony 7 support #1222

Job	Run time
Static checks (PHP 8.2, Symfony ^6.4)	1m 20s
Static checks (PHP 8.2, Symfony ^6.4)	1m 25s
Test application (PHP 8.2, Symfony ^6.4, Behat driver panther), MySQL 5.7)	3m 4s
Static checks (PHP 8.2, Symfony ^7.1)	1m 32s
Test application (PHP 8.2, Symfony ^7.1, Behat driver panther), MySQL 5.7)	2m 41s
Static checks (PHP 8.2, Symfony ^7.1)	1m 37s
Test application (PHP 8.3, Symfony ^6.4, Behat driver panther), MySQL 5.7)	2m 39s
Static checks (PHP 8.3, Symfony ^6.4)	1m 17s
Test application (PHP 8.3, Symfony ^7.1, Behat driver panther), MySQL 5.7)	2m 30s
Static checks (PHP 8.3, Symfony ^6.4)	1m 21s
Test application (PHP 8.2, Symfony ^6.4, Behat driver chrome), MySQL 5.7)	2m 35s
Static checks (PHP 8.3, Symfony ^7.1)	1m 17s
Test application (PHP 8.2, Symfony ^6.4, Behat driver chrome_headless), MySQL 5.7)	2m 51s
Static checks (PHP 8.3, Symfony ^7.1)	1m 18s
	27m 27s

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