Build and finalize batches for multiple data markets

[anomit]

Is your feature request related to a problem?

This follows the overarching plan of supporting multiple data markets in one single deployment of the sequencer system.

References issues for implementation of the same in other components that make up sequencer

• Support multiple data markets sequencer-dequeuer#8
• Collect epochs, submissions across multiple data markets submission-sequencer-event-collector#2

Describe the solution you'd like
Refer to issues above.

Describe alternatives you've considered
NA

Additional context
NA