Dynamic fees

• Replace --dynamic-fee-strategy arg with a simpler --dynamic-fee flag.
• If --dynamic-fee flag is set, try using dynamic fees. Fallback to static if rpc does not support dynamic fees.
• Infer the strategy implicitly based on the rpc url.

Resign

• After 10 failed attempts to submit a transaction, refresh the priority fee and blockhash, resign and submit.

Bus strategy

• Submit hashes to the bus with the highest balance to minimize chances of sending on a bus that has been drained.

Benchmark

• Use reusable memory and core pinning for benchmark tests.