Convert pinot query to use unix milliseconds instead of nano

[neil-xie]

What changed?
Convert time units to milliseconds from nanoseconds for pinot query

Why?
By default it is passing nano seconds from frontend

How did you test it?
Unit test

Potential risks

Release notes

Documentation Changes

[coveralls]

Pull Request Test Coverage Report for Build 018d8fc5-fc12-4b7b-ad3d-9526466dcf69

• -6 of 54 (88.89%) changed or added relevant lines in 1 file are covered.
• 25 unchanged lines in 10 files lost coverage.
• Overall coverage increased (+0.06%) to 62.725%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
common/pinot/pinotQueryValidator.go	48	54	88.89%

Files with Coverage Reduction	New Missed Lines	%
common/task/parallel_task_processor.go	2	93.06%
common/task/weighted_round_robin_task_scheduler.go	2	88.56%
service/history/shard/context.go	2	66.52%
service/history/task/timer_task_executor_base.go	2	78.38%
service/history/task/transfer_active_task_executor.go	2	72.24%
service/history/task/transfer_standby_task_executor.go	2	87.86%
service/matching/matcher.go	2	90.72%
service/history/queue/timer_queue_processor_base.go	3	77.82%
service/history/task/fetcher.go	4	86.08%
service/history/task/task_util.go	4	75.14%

Totals
Change from base Build 018d8e81-8a83-4fc7-b54e-ed48a13d340b:	0.06%
Covered Lines:	92324
Relevant Lines:	147189

---

💛 - Coveralls

[3vilhamster]

LGTM