feat: check channel timed out before data submission

[bendanzhentan]

Specification

Previously, Batcher would check the channel timeout after confirming a transaction.

Now this PR also checks the channel timeout before sending a transaction.

If there are pending channel frames that have not yet been submitted and the current l1Head exceeds the channel timeout, it is advisable to cancel the pending channel to prevent unnecessary submission.

By canceling the pending channel, its blocks will be re-pushed back to the pending blocks queue. And later, the Batcher will make attempt to construct a new channel.

Rational

Check channel timeout before sending transactions to reduce the probability of on-chain channel timeout.

Context for reproducing issue

1. Construct a multi-frames channel.
2. Submit certain frames of this channel.
3. Batcher has insufficient balance for the submission of the remaining frames.
4. wait(channel_timeout)
5. Fund some balance to Batcher. Batcher re-submits the remaining frames.
6. On-chain channel timeout occurs

Review suggestion

This additional check is not required if we can guarantee sufficient balance

The probability is very low.

My personal opinion would be to close this PR.

[github-actions]

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