Add throughput optimized configuration

[ibraheemdev]

By default, papaya and seize are configured to avoid tail latency spikes and prevent memory usage spikes caused by stalled threads. However, for short-lived applications (often CLIs), this is unnecessary. It might be helpful to add a easy way to configure for throughput without having to pull in the seize dependency. Something like HashMap::builder().prioritize_throughput().build(), which would set ResizeMode::Blocking and epoch_frequency(None). At the very least, the combination of these settings should be documented.