feat: add Google Tag Manager to marketing website #18232

Job	Run time
knip	46s
platform-unit-test (windows-latest)	9m 2s
check-translations	37s
platform-unit-test (ubuntu-latest)	4m 19s
compile	2m 16s
check-openrouter-api-key	3s
integration-test	3m 24s
	20m 27s

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