Add option to manually specify config file path #960

Job	Run time
php-cs-fixer	32s
Define Matrix	11s
PHPUnit (PHP 8.1)	14s
phpstan	27s
PHPUnit (PHP 8.2)	12s
PHPUnit (PHP 8.3)	21s
Build PHP Test (PHP 8.0 macos-14)	8m 20s
Build PHP Test (PHP 8.0 ubuntu-latest)	14m 14s
Build PHP Test (PHP 8.0 macos-13)	18m 43s
Build PHP Test (PHP 8.0 windows-latest)	9m 21s
Build PHP Test (PHP 8.1 macos-14)	9m 3s
Build PHP Test (PHP 8.1 ubuntu-latest)	14m 10s
Build PHP Test (PHP 8.1 macos-13)	19m 43s
Build PHP Test (PHP 8.1 windows-latest)	9m 40s
Build PHP Test (PHP 8.2 macos-14)	9m 44s
Build PHP Test (PHP 8.2 ubuntu-latest)	14m 37s
Build PHP Test (PHP 8.2 macos-13)	19m 42s
Build PHP Test (PHP 8.2 windows-latest)	9m 43s
Build PHP Test (PHP 8.3 macos-14)	10m 0s
Build PHP Test (PHP 8.3 ubuntu-latest)	14m 38s
Build PHP Test (PHP 8.3 macos-13)	18m 13s
Build PHP Test (PHP 8.3 windows-latest)	9m 1s
	3h 30m 49s

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