(consensus/params): Set default value of BlobParams.maxBytes to 0

[jmalicevic]

As initially blobs will be disabled it makes sense to have the blob max bytes set to be 0 by default. This way, when the feature is enabled, there needs to be a governence proposal to update the max bytes to be something > 0 and < 800kb.

[sergio-mena]

Thanks a lot for your patience 🙏. I know sometimes you need a good deal of it to cope with my reviews.

Only one last comment, but it's just a matter of how far we want to go with checks. Up to you if you want to address it.

APPROVE (I'm approving here, as I can't hit the "Approve" below)

[sonarqubecloud]

Quality Gate passed

Issues
4 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud