[6.x] Add Symfony 7 support #708

Job	Run time
Code Coverage (ubuntu-latest, 8.1, highest)	3m 0s
Coding Standards (8.1)	18s
Static Analysis (8.1)	31s
Lint composer.json (8.1)	31s
Lint XMLs (8.1)	21s
Tests (ubuntu-latest, 7.3, lowest)	48s
Tests (ubuntu-latest, 7.3, highest)	59s
Tests (ubuntu-latest, 7.4, lowest)	1m 5s
Tests (ubuntu-latest, 7.4, highest)	39s
Tests (ubuntu-latest, 8.0, lowest)	45s
Tests (ubuntu-latest, 8.0, highest)	54s
Tests (ubuntu-latest, 8.1, lowest)	52s
Tests (ubuntu-latest, 8.1, highest)	55s
Tests (ubuntu-latest, 8.2, lowest)	1m 0s
Tests (ubuntu-latest, 8.2, highest)	59s
Tests (windows-latest, 7.3, lowest)	1m 18s
Tests (windows-latest, 7.3, highest)	1m 23s
Tests (windows-latest, 7.4, lowest)	1m 24s
Tests (windows-latest, 7.4, highest)	1m 37s
Tests (windows-latest, 8.0, lowest)	1m 29s
Tests (windows-latest, 8.0, highest)	1m 41s
Tests (windows-latest, 8.1, lowest)	2m 22s
Tests (windows-latest, 8.1, highest)	1m 51s
Tests (windows-latest, 8.2, lowest)	1m 56s
Tests (windows-latest, 8.2, highest)	1m 30s
	30m 8s

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