Update dependency phpstan/phpstan-phpunit to v2 #2509

Job	Run time
Check Backward Compatibility (locked, 8.3, ubuntu-latest)	20s
Run benchmarks (locked, 8.3, ubuntu-latest)	14s
Check Coding Standards (locked, 8.2, ubuntu-latest)	24s
Run benchmarks (locked, 8.3, windows-latest)	37s
Test Compatibility (locked, 8.3, ubuntu-latest)	19s
Check Demo Scripts (locked, 8.3, ubuntu-latest)	12s
Test Compatibility (locked, 8.3, windows-latest)	50s
Mutation tests (locked, 8.3, ubuntu-latest)	13s
Static Analysis by PHPStan (locked, 8.2, ubuntu-latest)	23s
PHPUnit tests (lowest, 8.2, ubuntu-latest)	3s
Static Analysis by PHPStan (locked, 8.3, ubuntu-latest)	19s
Static Analysis by Psalm (locked, 8.3, ubuntu-latest)	22s
PHPUnit tests (lowest, 8.2, windows-latest)	1s
PHPUnit tests (lowest, 8.3, ubuntu-latest)	1s
PHPUnit tests (lowest, 8.3, windows-latest)	1s
PHPUnit tests (highest, 8.2, ubuntu-latest)	17s
PHPUnit tests (highest, 8.2, windows-latest)	45s
PHPUnit tests (highest, 8.3, ubuntu-latest)	13s
PHPUnit tests (highest, 8.3, windows-latest)	36s
PHPUnit tests (locked, 8.2, ubuntu-latest)	17s
PHPUnit tests (locked, 8.2, windows-latest)	18s
PHPUnit tests (locked, 8.3, ubuntu-latest)	6s
PHPUnit tests (locked, 8.3, windows-latest)	10s
	7m 1s

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