Introduce --sim.exclude flag for excluding suites / tests

[Rjected]

While --sim.limit is useful, we have been setting up some hive suites to run as github actions, and some test suites are not yet applicable, and should be excluded.

For example, snap in the devp2p simulator is not yet applicable because we do not support the snap subprotocol yet. The sim.limit does accept a regular expression, but the golang regular expression library does not support negative lookaheads / lookbehinds. To exclude a suite, we have to explicitly include every other suite. To exclude a test, we have to explicitly include every other test.

To exclude snap, we have to run --sim.limit for each suite we want to include in devp2p, which is luckily only discv4 and eth.

I think it makes sense to allow both --sim.limit and --sim.exclude for this use case, for example:

hive --clients reth --sim devp2p --sim.limit eth --sim.exclude /TestBlockHashAnnounce

Because reth does not process block hash announcements, this would exclude the right test, while allowing us to run all other tests in eth. Without sim.exclude, we would have to enumerate all tests we want to include using the sim.limit flag.

Does this make sense?