Remove deprecation ReflectionMethod::setAccessible #474

Job	Run time
Linter / yaml-linter	4s
Linter / json-linter	22s
PHP-Linter (8.5) / linter	13s
Linter / style-linter	0s
Linter / ecmascript-linter	0s
Unit tests, PHP 8.5, windows-latest	1m 35s
Unit tests, PHP 8.5, ubuntu-latest	17s
Quality control	20s
Security checks	18s
Code coverage	6s
Cleanup artifacts	4s
	3m 19s

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