Harmonize CI & files (#33) #35

Job	Run time
Tests / Fetch supported versions	6s
Tests / Static analysis	24s
Tests / Bare minimum	19s
Tests / Bare minimum - Special case - Symfony 5.4	17s
Tests / Up to date versions - Special case - Symfony 5.4	3m 5s
Tests / Up to date versions	4m 2s
Tests / Late migration - PHP	45s
Tests / Late migration - Symfony	2m 32s
Tests / Nightly - PHP - With highest supported Symfony versions	27s
Tests / Nightly - Symfony - With highest supported PHP version	13s
Tests / Nightly - PHP - With lowest supported Symfony versions	18s
Tests / Nightly - Symfony - With lowest supported PHP version	14s
	12m 42s

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