Update RollappPendingSubmissionsSkewBatches each block

[Northa]

https://github.com/dymensionxyz/dymint/blob/ed72d9b5c6dd28bb5a02ebb7a536b664facb2121/block/submit.go#L80-L85

During some internal tests i noticed that rollapp_pending_submissions_skew_batches metric not updating in real time.

Steps to reproduce.

1. a working rollapp setup with da-client.
2. restart\stop hub rpc.
3. Simulate a load test by sending some txs into rollapp.
4. Monitor the rollapp_pending_submissions_skew_batches metric.

possible fix: https://github.com/Northa/dymint/commit/9c6806638f1e67341557e0825e756b4ff2662b15

UPDATE2: When it comes to pause block production due to too many batches are pending submission metrics are not updating as well. Affected metrics

rollapp_pending_submissions_skew_bytes
rollapp_pending_submissions_skew_batches
rollapp_pending_submissions_skew_blocks

time="Nov 12 13:45:31.686" level=error msg="Enough bytes to build a batch have been accumulated, but too many batches are pending submission. Pausing block production until a signal is consumed.[]" module=block_manager

Not sure but probably metrics must be updated there https://github.com/dymensionxyz/dymint/blob/30a84dfb75902ed54c6f5a89d663f0f54e0b6af8/block/submit.go#L129-L131