Remove mcp.json configuration and add it to .gitignore (#4422) #8755

Job	Run time
knip	28s
compile	1m 37s
check-translations	23s
check-openrouter-api-key	1s
platform-unit-test (ubuntu-latest)	5m 11s
platform-unit-test (windows-latest)	6m 16s
integration-test	2m 5s
	16m 1s

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