Cargo.toml: Simplify profiles #426

Job	Run time
Build the fuzzers	47s
Run the fuzzers (fuzz_ed, true)	39s
Run the fuzzers (fuzz_normal, true)	54s
Run the fuzzers (fuzz_side, true)	42s
Run the fuzzers (fuzz_patch, true)	46s
Run the fuzzers (fuzz_cmp, true)	1m 11s
Run the fuzzers (fuzz_cmp_args, true)	44s
	5m 43s

Provide feedback