Complete CwaFixtureBuilder: fix route ordering and expand test coverage #1507

Job	Run time
PHPUnit (Symfony 7.4) (PHP 8.5)	2m 3s
PHP-CS-Fixer (PHP 8.5)	15s
Behat (Symfony 8.1) (PHP 8.5)	4m 47s
PHPUnit (Symfony ^7.4) (PHP 8.5) (lowest dependencies)	45s
Behat (Symfony 7.4) (PHP 8.5)	4m 32s
PHPUnit (Symfony 8.1) (PHP 8.5)	53s
Behat (Symfony NEXT 8.2) (PHP 8.5)	4m 1s
PHPUnit (Symfony NEXT 8.2) (PHP 8.5)	50s
Behat (Symfony ^7.4) (PHP 8.5) (lowest dependencies)	4m 30s
	22m 36s

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