Tests

Add support for PHP 8.5 `#[\NoDiscard]` #22166

Job	Run time
Integration tests (ubuntu-latest)	23s
Determine levels tests matrix	26s
Integration tests (windows-latest)	58s
Tests (8.3, windows-latest)	1m 13s
Tests (8.4, ubuntu-latest)	25s
Tests (8.2, ubuntu-latest)	23s
Tests (8.3, ubuntu-latest)	26s
Tests (8.5, windows-latest)	1m 23s
Tests with old PHPUnit (7.4, ubuntu-latest)	1m 47s
Tests (8.5, ubuntu-latest)	22s
Tests (8.4, windows-latest)	1m 3s
Tests (8.2, windows-latest)	1m 11s
Tests with old PHPUnit (7.4, windows-latest)	1m 44s
Tests with old PHPUnit (8.1, ubuntu-latest)	37s
Tests with old PHPUnit (8.0, ubuntu-latest)	39s
Tests with old PHPUnit (8.1, windows-latest)	1m 33s
Tests with old PHPUnit (8.0, windows-latest)	1m 33s
Levels tests	-1s
	16m 5s

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