fix(sample): 'codegen didn't run for RN*' warning caused by incorrect metro config #4404

Job	Run time
diff_check / diff_check	6s
Build legacy android dev no-frameworks	7m 0s
Build legacy android production no-frameworks	7m 59s
Build legacy ios dev no-frameworks	17m 54s
Build legacy ios production no-frameworks	22m 33s
Build legacy macos dev no-frameworks	23m 8s
Build legacy macos production no-frameworks	29m 27s
Build legacy ios dev dynamic-frameworks	24m 52s
Build legacy ios production dynamic-frameworks	27m 0s
Build new android dev no-frameworks	7m 46s
Build new android production no-frameworks	9m 1s
Build new ios dev no-frameworks	24m 55s
Build new ios production no-frameworks	23m 44s
	3h 45m 25s

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