Harmonize CI (#34) #37

Job	Run time
Tests / Fetch supported versions	7s
Tests / Static analysis	28s
Tests / PHP 8.1 & Sf 6.4 - Late PHP migration	15s
Tests / PHP 8.4 & Sf 5.4 - Up to date versions - Sf 5.4 case	3m 15s
Tests / PHP 8.0 & Sf 4.4 - Bare minimum	19s
Tests / PHP 8.0 & Sf 5.4 - Bare minimum - Sf 5.4 case	17s
Tests / PHP 8.4 & Sf 6.4 - Up to date versions	4m 22s
Tests / PHP 8.4 & Sf 4.4 - Late Symfony migration	2m 22s
Tests / Nightly - PHP 8.5 & Sf 6.4 - PHP with highest supported Symfony versions	16s
Tests / Nightly - PHP 8.5 & Sf 4.4 - PHP with lowest supported Symfony versions	20s
Tests / Nightly - PHP 8.4 & Sf 7.0 - Symfony with highest supported PHP version	15s
Tests / Nightly - PHP 8.2 & Sf 7.0 - Symfony with lowest supported PHP version	14s
	12m 30s

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