fix(jmh,query): Fix PlanDispatcher timeout handling + QueryInMemoryBenchmark

[velvia]

Pull Request checklist

• The commit(s) message(s) follows the contribution guidelines ?
• Tests for the changes have been added (for bug fixes / features) ?
• Docs have been added / updated (for bug fixes / features) ?

Current behavior : (link exiting issues here : https://help.github.com/articles/basic-writing-and-formatting-syntax/#referencing-issues-and-pull-requests)

• If a query times out in PlanDispatcher check, an error is thrown which is not handled in standard Query flow, causing QueryActor to be restarted sometimes
• QueryInMemoryBenchmark was timing out due to old query IDs, and spread not being correct

New behavior :

• PlanDispatcher now returns a QueryError properly
• QueryInMemoryBenchmark queries now all have unique startTime, and spread is fixed. Benchmark now runs to completion