Update module google.golang.org/grpc to v1.56.3 [SECURITY] #1216

Job	Run time
small_test_cc	3m 44s
medium_test_cc	5m 27s
lint	29s
small_test_bts	58s
small_test_mc	40s
medium_test_container_restart (send_share)	50s
medium_test_container_up	1m 0s
medium_test_container_restart (execute_computation)	50s
medium_test_container_restart (get_computation_result)	50s
medium_test_container_restart (execute_multiple)	49s
medium_test_libclient (correl)	7m 32s
medium_test_libclient (get_computation_result)	7m 33s
medium_test_mc	38s
medium_test_libclient (get_elapsed_time)	7m 14s
medium_test_libclient (job_error_info)	6m 55s
medium_test_container_down (send_share)	1m 0s
medium_test_libclient (join)	6m 32s
medium_test_container_down (execute_computation)	49s
medium_test_container_down (get_computation_result)	59s
medium_test_libclient (mean)	6m 55s
medium_test_libclient (parallel)	6m 48s
medium_test_libclient (send_share)	7m 5s
medium_test_libclient (string)	7m 24s
medium_test_libclient (sum)	7m 13s
medium_test_libclient (token)	7m 16s
medium_test_libclient (variance)	7m 23s
medium_test_container	0s
small_test	0s
medium_test	0s
	1h 44m 53s

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