Use new constants self-references #1666

Job	Run time
Entrypoint low-PHP compat	12s
PHP 7.4 Fixer with lowest deps	1m 7s
PHP 7.4 tests with lowest deps	3m 1s
PHP 8.0 Fixer	47s
PHP 8.0 tests	3m 9s
PHP 8.1 Fixer with Symfony ^6	48s
PHP 8.1 tests with Symfony ^6	3m 22s
PHP 8.2 Fixer	1m 3s
PHP 8.2 tests	3m 52s
PHP 8.3 Fixer	42s
PHP 8.3 tests	3m 50s
PHP 8.3 Fixer with migration rules	1m 27s
PHP 8.3 tests with migration rules	4m 7s
PHP 8.3 Fixer with Symfony ^7	1m 16s
PHP 8.3 tests with Symfony ^7	3m 36s
PHP 8.3 code coverage	4m 50s
PHP 8.3 mutation tests	24s
PHP 8.3 Fixer on Windows	1m 44s
PHP 8.3 tests on Windows	2m 35s
PHP 8.3 Fixer on macOS	1m 40s
PHP 8.3 tests on macOS	1m 53s
PHP 8.4 Fixer	42s
PHP 8.4 tests	3m 49s
Deployment checks	44s
	50m 40s

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