Tests

Add test for phpstan issue 7396 #21879

Job	Run time
Integration tests (windows-latest)	1m 6s
Integration tests (ubuntu-latest)	26s
Determine levels tests matrix	21s
Tests with old PHPUnit (8.0, ubuntu-latest)	1m 52s
Tests with old PHPUnit (7.4, windows-latest)	2m 31s
Tests with old PHPUnit (7.4, ubuntu-latest)	2m 34s
Tests with old PHPUnit (8.0, windows-latest)	2m 30s
Tests with old PHPUnit (8.1, windows-latest)	2m 32s
Tests (8.3, ubuntu-latest)	21s
Tests (8.2, ubuntu-latest)	25s
Tests (8.2, windows-latest)	1m 6s
Tests (8.4, windows-latest)	1m 2s
Tests with old PHPUnit (8.1, ubuntu-latest)	1m 56s
Tests (8.3, windows-latest)	1m 8s
Tests (8.5, ubuntu-latest)	27s
Tests (8.5, windows-latest)	1m 17s
Tests (8.4, ubuntu-latest)	26s
Levels tests	0s
	22m 0s

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