Replace download with symfony http-client #231

Job	Run time
Linter / json-linter	29s
PHP-Linter (8.3) / linter	14s
Linter / yaml-linter	5s
PHP-Linter (8.5) / linter	15s
PHP-Linter (8.4) / linter	18s
Linter / ecmascript-linter	0s
Linter / style-linter	0s
Unit tests, PHP 8.3, windows-latest	58s
Unit tests, PHP 8.5, ubuntu-latest	30s
Unit tests, PHP 8.4, ubuntu-latest	27s
Unit tests, PHP 8.4, windows-latest	1m 9s
Unit tests, PHP 8.5, windows-latest	1m 8s
Unit tests, PHP 8.3, ubuntu-latest	32s
Security checks	-1s
Code coverage	-1s
Quality control	-1s
Cleanup artifacts	0s
	6m 2s

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