Rewrote getOpenMageVersion() to be faster #3900

Job	Run time
Debug	1s
Check files / Changed	10s
Code-QL	0s
XML Syntax	0s
Composer / Validation	11s
PHP CS Fixer / Validation	2m 29s
PHPStan / Analyze (ubuntu-latest, 7.4)	4m 2s
PHP CS / Default	4m 3s
PHPStan / Analyze (ubuntu-latest, 8.3)	2m 26s
PHP CS / Ecg	2m 10s
PHP CS / PhpCompatibility	5m 36s
PHP Syntax	0s
Unit Tests (Sonar)	0s
Unit Tests (OpenMage)	0s
	21m 8s

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