Datafusion Optimizations and Integrations

[trueleo]

Tracking issue for things to be done in order to fully integrate Datafusion with Parseable and solve some of the existing query issues.

• Better partition pruning and query performance on order by p_timestamp DESC.
• Add physical optimizer to remove SortMergeExec on order by queries.
• Add physical optimizer to preserve partition order on select * from table as they are already sorted in ascending order. Sort order is now Desc and single partition preserves order for simple select query
• Add optimization based on the fact that data is non overlapping on timestamp column
• Integrate datafusion::catalog.

[trueleo]

There is a discussion about SortMergeExec here apache/datafusion#6672

[nitisht]

Fixed in recent commits. Closing this.