Prevent autoloading when determinig constant values #2109

Job	Run time
Static Analysis by PHPStan (locked, 8.2, ubuntu-latest)	27s
Static Analysis by PHPStan (locked, 8.3, ubuntu-latest)	28s
Check Coding Standards (locked, 8.2, ubuntu-latest)	22s
Check Backward Compatibility (locked, 8.2, ubuntu-latest)	20s
Run benchmarks (locked, 8.2, ubuntu-latest)	21s
Check Demo Scripts (locked, 8.2, ubuntu-latest)	14s
Run benchmarks (locked, 8.2, windows-latest)	53s
Test Compatibility (locked, 8.2, ubuntu-latest)	15s
Mutation tests (locked, 8.3, ubuntu-latest)	11m 50s
Test Compatibility (locked, 8.2, windows-latest)	52s
Static Analysis by Psalm (locked, 8.3, ubuntu-latest)	26s
PHPUnit tests (lowest, 8.2, ubuntu-latest)	1m 32s
PHPUnit tests (lowest, 8.2, windows-latest)	2m 43s
PHPUnit tests (lowest, 8.3, ubuntu-latest)	2m 3s
PHPUnit tests (lowest, 8.3, windows-latest)	2m 29s
PHPUnit tests (highest, 8.2, ubuntu-latest)	4m 43s
PHPUnit tests (highest, 8.2, windows-latest)	3m 19s
PHPUnit tests (highest, 8.3, ubuntu-latest)	2m 16s
PHPUnit tests (highest, 8.3, windows-latest)	2m 31s
PHPUnit tests (locked, 8.2, ubuntu-latest)	2m 6s
PHPUnit tests (locked, 8.2, windows-latest)	3m 24s
PHPUnit tests (locked, 8.3, ubuntu-latest)	3m 57s
PHPUnit tests (locked, 8.3, windows-latest)	2m 35s
	50m 6s

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