[Flight] Fix dev-only crash when passing elements into 3rd party renderers#35690

eps1lon wants to merge 1 commit intofacebook:mainfacebook/react:mainfrom

eps1lon:sebbie/02-04-_flight_fix_dev-only_crash_when_nesting_3rd_party_componentseps1lon/react:sebbie/02-04-_flight_fix_dev-only_crash_when_nesting_3rd_party_componentsCopy head branch name to clipboard