multicall: add --list to list all utils #2847

Job	Run time
Build the fuzzers	2m 12s
Run the fuzzers (fuzz_test, true)	2m 13s
Run the fuzzers (fuzz_date, false)	3m 33s
Run the fuzzers (fuzz_expr, true)	2m 27s
Run the fuzzers (fuzz_printf, false)	3m 17s
Run the fuzzers (fuzz_echo, true)	2m 39s
Run the fuzzers (fuzz_seq, false)	3m 7s
Run the fuzzers (fuzz_sort, false)	3m 41s
Run the fuzzers (fuzz_wc, false)	1m 39s
Run the fuzzers (fuzz_cut, false)	1m 35s
Run the fuzzers (fuzz_split, false)	3m 36s
Run the fuzzers (fuzz_tr, false)	1m 16s
Run the fuzzers (fuzz_env, false)	1m 25s
Run the fuzzers (fuzz_parse_glob, true)	2m 17s
Run the fuzzers (fuzz_parse_size, true)	4m 2s
Run the fuzzers (fuzz_parse_time, true)	4m 5s
Run the fuzzers (fuzz_seq_parse_number, true)	4m 4s
	47m 8s

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