Tests

Add support for PHP 8.5 `#[\NoDiscard]` #22168

Job	Run time
Integration tests (ubuntu-latest)	22s
Integration tests (windows-latest)	1m 8s
Determine levels tests matrix	21s
Tests (8.4, windows-latest)	1m 5s
Tests (8.2, ubuntu-latest)	26s
Tests (8.3, ubuntu-latest)	20s
Tests (8.2, windows-latest)	1m 3s
Tests (8.5, ubuntu-latest)	25s
Tests (8.3, windows-latest)	1m 11s
Tests with old PHPUnit (7.4, windows-latest)	4m 32s
Tests (8.5, windows-latest)	1m 12s
Tests with old PHPUnit (8.0, ubuntu-latest)	41s
Tests with old PHPUnit (7.4, ubuntu-latest)	4m 36s
Tests with old PHPUnit (8.1, windows-latest)	1m 32s
Tests (8.4, ubuntu-latest)	20s
Tests with old PHPUnit (8.0, windows-latest)	1m 29s
Tests with old PHPUnit (8.1, ubuntu-latest)	37s
Levels tests	0s
	21m 20s

Provide feedback