Failover metrics scope improve

[yux0]

What changed?

1. Fix graceful failover failure metrics
2. Improve failover metrics scope initialization

Why?
Provide detail failover metrics with domain tags

How did you test it?

Potential risks

Release notes

Documentation Changes

[coveralls]

Pull Request Test Coverage Report for Build 11633ff8-db79-4ddc-b34b-029ef657b680

• 6 of 10 (60.0%) changed or added relevant lines in 2 files are covered.
• 40 unchanged lines in 14 files lost coverage.
• Overall coverage increased (+0.005%) to 56.439%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
common/domain/failover_watcher.go	2	4	50.0%
service/history/failover/coordinator.go	4	6	66.67%

Files with Coverage Reduction	New Missed Lines	%
common/domain/failover_watcher.go	1	61.67%
service/history/execution/mutable_state_task_refresher.go	1	74.4%
client/history/client.go	2	41.25%
client/history/metricClient.go	2	47.05%
common/persistence/historyManager.go	2	66.33%
common/task/weightedRoundRobinTaskScheduler.go	2	89.64%
common/types/mapper/thrift/shared.go	2	64.98%
service/history/execution/mutable_state_builder.go	2	69.86%
service/history/handler.go	2	48.15%
service/matching/taskListManager.go	2	74.09%

Totals
Change from base Build 3963ea27-5204-4d7b-ad45-4bcec71b5360:	0.005%
Covered Lines:	78715
Relevant Lines:	139470

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💛 - Coveralls