GNU/CI: use the aggregated-result.json files and move to python #6956

Job	Run time
Build the fuzzers	1m 57s
Run the fuzzers (fuzz_date, false)	1m 48s
Run the fuzzers (fuzz_test, true)	2m 33s
Run the fuzzers (fuzz_split, false)	1m 50s
Run the fuzzers (fuzz_env, false)	1m 24s
Run the fuzzers (fuzz_printf, false)	2m 43s
Run the fuzzers (fuzz_wc, false)	1m 20s
Run the fuzzers (fuzz_echo, true)	2m 22s
Run the fuzzers (fuzz_sort, false)	1m 36s
Run the fuzzers (fuzz_seq, false)	1m 37s
Run the fuzzers (fuzz_expr, true)	2m 39s
Run the fuzzers (fuzz_tr, false)	1m 30s
Run the fuzzers (fuzz_cksum, false)	1m 29s
Run the fuzzers (fuzz_parse_glob, true)	2m 18s
Run the fuzzers (fuzz_cut, false)	1m 34s
Run the fuzzers (fuzz_seq_parse_number, true)	2m 17s
Run the fuzzers (fuzz_parse_size, true)	1m 41s
Run the fuzzers (fuzz_parse_time, true)	2m 23s
	35m 1s

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