[EXPERIMENT] refactor: migrate tool call format to function_calls/invoke pattern #17397

Job	Run time
compile	2m 8s
check-translations	33s
knip	50s
platform-unit-test (ubuntu-latest)	4m 11s
platform-unit-test (windows-latest)	8m 0s
check-openrouter-api-key	3s
integration-test	8m 20s
	24m 5s

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