Fix MCP test independence #10011

Job	Run time
check-translations	35s
knip	36s
compile	1m 48s
platform-unit-test (windows-latest)	4m 14s
platform-unit-test (ubuntu-latest)	3m 1s
check-openrouter-api-key	3s
integration-test	8m 10s
notify-slack-on-failure	0s
	18m 27s

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