builder: Handle senders without pending transaction support

[dancoombs]

Describe the feature Not all senders have the ability to check the status of a pending transaction.

Examples:

• Optimism
• Arbitrum
• Flashbots (when using non-Flashbots builders)

The builder should be able to handle this case, and instead of logging the transaction as dropped, it should resend after N blocks with a higher fee.

We can view senders that support pending transactions as a special case that lets us resend after < N blocks if we notice the transaction has specifically been dropped. If the sender does not support pending transactions, we will always wait N blocks. We will likely set N to 2 on most networks, Arbitrum being the special case.