`--no-dictionaries` flag seems to be ignored by some fuzzers/benchmarks.

It seems like some fuzzer-benchmarks combinations do not respect the `--no-dictionaries` option.

For example:

`aflplusplus` and `libpcap_fuzz_both`

in my experiment config I have:

```
no_dictionaries: true
```

But in the fuzzer logs I see:

```
[run_afl_fuzz] Running command: ./afl-fuzz -i /out/seeds -o /out/corpus -m none -t 1000+ -d -x ./afl++.dict -c /out/cmplog/fuzz_both -- /out/fuzz_both 2147483647
```