Migrate DOM-classes to PHP 8.4's new DOM-API #1480

Job	Run time
Linter / yaml-linter	5s
Linter / json-linter	26s
PHP-Linter (8.5) / linter	8s
PHP-Linter (8.6) / linter	9s
Linter / ecmascript-linter	0s
Linter / style-linter	-6s
Unit tests, PHP ${{ matrix.php-versions }}, ${{ matrix.operating-system }}	-1s
Code coverage	-1s
Quality control	-1s
Unit tests, PHP ${{ matrix.php-versions }}, ${{ matrix.operating-system }}	-1s
Security checks	-1s
Cleanup artifacts	-1s
	36s

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