Move shardscanner workflow tests to the shardscanner package

[natemort]

What changed?

• Move existing tests for the shardscanner workflows to be in the shardscanner package.

Why?

• Improve code coverage metrics

How did you test it?

• Unit tests

Potential risks

Release notes

Documentation Changes

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 64.08%. Comparing base (2ac145f) to head (e06d148).
Report is 1 commits behind head on master.

Additional details and impacted files

see 9 files with indirect coverage changes

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[coveralls]

Pull Request Test Coverage Report for Build 018f5495-ff35-464f-adfd-e78b0d8345c5

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 50 unchanged lines in 10 files lost coverage.
• Overall coverage increased (+0.1%) to 68.26%

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Files with Coverage Reduction	New Missed Lines	%
common/task/weighted_round_robin_task_scheduler.go	1	89.05%
service/history/task/transfer_standby_task_executor.go	2	87.65%
service/history/shard/context.go	2	68.91%
common/peerprovider/ringpopprovider/config.go	2	81.58%
common/task/fifo_task_scheduler.go	2	85.57%
service/history/task/transfer_active_task_executor.go	2	72.9%
service/history/execution/mutable_state_util.go	2	78.52%
common/persistence/historyManager.go	2	66.67%
service/history/task/fetcher.go	3	85.57%
service/history/execution/mutable_state_task_refresher.go	32	56.65%

Totals
Change from base Build 018f5467-b337-442d-bcf0-8ad761c213c7:	0.1%
Covered Lines:	100260
Relevant Lines:	146880

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💛 - Coveralls