Fix Pinot response util to exclude closed wf fields when list open

[neil-xie]

What changed?
Pinot has default value -1 for CloseTime/CloseStatus when workflow is open

Why?
Bug fix

How did you test it?
Manual test

Potential risks

Release notes

Documentation Changes

[codecov]

Codecov Report

Merging #5808 (21cfd36) into master (857b007) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

❗ Current head 21cfd36 differs from pull request most recent head ac0aed5. Consider uploading reports for the commit ac0aed5 to get more accurate results

Additional details and impacted files

Files	Coverage Δ
common/pinot/response_utility.go	100.00% <100.00%> (ø)

... and 4 files with indirect coverage changes

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[coveralls]

Pull Request Test Coverage Report for Build 018e62fb-90c7-415b-9fce-5c1f87251e7e

Details

• 2 of 2 (100.0%) changed or added relevant lines in 1 file are covered.
• 44 unchanged lines in 14 files lost coverage.
• Overall coverage increased (+0.01%) to 65.372%

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Files with Coverage Reduction	New Missed Lines	%
service/matching/taskGC.go	1	97.37%
common/task/weighted_round_robin_task_scheduler.go	2	89.05%
common/persistence/sql/sqlplugin/postgres/task.go	2	73.4%
service/history/shard/context.go	2	66.7%
common/persistence/sql/sqlplugin/postgres/db.go	2	80.0%
common/task/fifo_task_scheduler.go	2	82.47%
common/persistence/sql/sqlplugin/mysql/task.go	2	73.68%
common/util.go	2	91.78%
common/persistence/sql/sqlplugin/mysql/db.go	2	79.49%
common/log/tag/tags.go	3	50.18%

Totals
Change from base Build 018e62ed-ff77-41e3-9354-d40c17ed808d:	0.01%
Covered Lines:	95560
Relevant Lines:	146178

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💛 - Coveralls

[bowenxia]

LGTM