Tests

Add support for PHP 8.5 `#[\NoDiscard]` #22167

Job	Run time
Integration tests (ubuntu-latest)	27s
Determine levels tests matrix	23s
Integration tests (windows-latest)	1m 4s
Tests (8.2, ubuntu-latest)	29s
Tests (8.3, windows-latest)	1m 0s
Tests with old PHPUnit (7.4, ubuntu-latest)	1m 51s
Tests with old PHPUnit (8.0, ubuntu-latest)	45s
Tests (8.4, ubuntu-latest)	27s
Tests (8.3, ubuntu-latest)	32s
Tests with old PHPUnit (8.1, windows-latest)	1m 26s
Tests (8.5, windows-latest)	1m 6s
Tests with old PHPUnit (7.4, windows-latest)	1m 49s
Tests (8.5, ubuntu-latest)	29s
Tests with old PHPUnit (8.0, windows-latest)	1m 35s
Tests with old PHPUnit (8.1, ubuntu-latest)	43s
Tests (8.4, windows-latest)	1m 0s
Tests (8.2, windows-latest)	1m 5s
Levels tests	0s
	16m 11s

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