Harmonize CI & files #38

Job	Run time
Tests / Fetch supported versions	7s
Tests / Up to date versions - Special case - Symfony 5.4	14s
Tests / Bare minimum	17s
Tests / Static analysis	25s
Tests / Bare minimum - Special case - Symfony 5.4	19s
Tests / Up to date versions	20s
Tests / Late migration - Symfony	36s
Tests / Late migration - PHP	22s
Tests / Nightly - PHP - With highest supported Symfony versions	22s
Tests / Nightly - Symfony - With lowest supported PHP version	18s
Tests / Nightly - PHP - With lowest supported Symfony versions	22s
Tests / Nightly - Symfony - With highest supported PHP version	12s
	3m 54s

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