Allow benchmarking and profiling stable benchmarks

[Kobzol]

By adding a --category flag to bench_local and profile_local.

Fixes: #1777

[Nadrieril]

Thanks for making this! This solves my problem nicely

[nnethercote]

Should it be Primary,Secondary to match e.g. Debug and Full? Otherwise, looks good.

[Kobzol]

Yes, that would be a bit better match, but for that we'd have to rename the categories in the compile benchmarks JSON files on disk (since these use the lowercase name), and I didn't want to do that in this PR, seemed like an unnecessarily invasive change.

[nnethercote]

Is there some way to change this:

#[arg(long, value_parser = EnumArgParser::<Category>::default(), default_value = "primary,secondary")]

so that we can use upper case on the command line but then it gets converted to lower case internally to match the existing JSON?

[Kobzol]

Turns out that there is :) I thought that we use serde for parsing the CLI values, but that is not the case, so it was easy to change the field naming for serde/clap separately. Thanks!

[nnethercote]

👍