cksum: replace `is_some_and` with `is_none_or` #6592

Job	Run time
Build the fuzzers	2m 7s
Run the fuzzers (fuzz_test, true)	2m 24s
Run the fuzzers (fuzz_date, false)	2m 6s
Run the fuzzers (fuzz_expr, true)	2m 27s
Run the fuzzers (fuzz_printf, false)	2m 21s
Run the fuzzers (fuzz_echo, true)	2m 24s
Run the fuzzers (fuzz_seq, false)	1m 24s
Run the fuzzers (fuzz_sort, false)	1m 54s
Run the fuzzers (fuzz_wc, false)	1m 17s
Run the fuzzers (fuzz_cut, false)	1m 23s
Run the fuzzers (fuzz_split, false)	1m 34s
Run the fuzzers (fuzz_tr, false)	1m 31s
Run the fuzzers (fuzz_env, false)	1m 21s
Run the fuzzers (fuzz_cksum, false)	1m 36s
Run the fuzzers (fuzz_parse_glob, true)	2m 11s
Run the fuzzers (fuzz_parse_size, true)	2m 2s
Run the fuzzers (fuzz_parse_time, true)	2m 16s
Run the fuzzers (fuzz_seq_parse_number, true)	2m 16s
	34m 34s

Provide feedback