Update coverage exclusions

[taylanisikdemir]

What changed?

• Exclude *Test.go files
• Rename common/cache/interface_mocks.go to common/cache/interface_mock.go because that's the convention we use and exclude.

Why?
Improve coverage accuracy

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.93%. Comparing base (294a120) to head (0cb2670).
Report is 1 commits behind head on master.

❗ Current head 0cb2670 differs from pull request most recent head 36ff81e

Please upload reports for the commit 36ff81e to get more accurate results.

Additional details and impacted files

see 12 files with indirect coverage changes

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[coveralls]

Pull Request Test Coverage Report for Build 018fea5f-0e39-40b3-aa6d-5d7e6d72c31a

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 12 unchanged lines in 4 files lost coverage.
• Overall coverage increased (+0.01%) to 70.813%

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Files with Coverage Reduction	New Missed Lines	%
service/history/queue/timer_queue_processor_base.go	1	77.66%
service/matching/tasklist/task_list_manager.go	2	77.05%
common/persistence/statsComputer.go	3	98.21%
service/history/task/transfer_standby_task_executor.go	6	86.33%

Totals
Change from base Build 018fea0f-14e3-4984-94e0-5d6d068277b1:	0.01%
Covered Lines:	105470
Relevant Lines:	148942

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💛 - Coveralls