Introduce new type MatchingPollForActivityTaskResponse

[Shaddoll]

Detailed Description
Introduce new type MatchingPollForActivityTaskResponse to differentiate the activity poller responses from matching and frontend. We want to update the matching response to include some metadata of the tasklist which are not exposed to customers.

Impact Analysis

• Backward Compatibility: This is backward compatible because it only changes the internal type.
• Forward Compatibility: This is forward compatible because it only changes the internal type.

Testing Plan

• Unit Tests: We have unit tests in common/types folder.
• Persistence Tests: It doesn't change persisted data.
• Integration Tests: The existing integration tests cover the change.
• Compatibility Tests: The test is both backward compatible and forward compatible since it doesn't change the gprc or thrift type.

Rollout Plan

• What is the rollout plan?
• Does the order of deployment matter? No.
• Is it safe to rollback? Does the order of rollback matter? It's safe to rollback. Order doesn't matter.
• Is there a kill switch to mitigate the impact immediately? n/a

[codecov]

Codecov Report

Attention: Patch coverage is 97.18310% with 2 lines in your changes missing coverage. Please review.

Project coverage is 73.60%. Comparing base (ea3a90e) to head (a43c43a).
Report is 5 commits behind head on master.

Files with missing lines	Patch %	Lines
service/matching/handler/engine.go	60.00%	2 Missing ⚠️

Additional details and impacted files

Files with missing lines	Coverage Δ
client/matching/client.go	89.47% <100.00%> (ø)
common/types/mapper/proto/matching.go	95.34% <100.00%> (ø)
common/types/mapper/thrift/matching.go	99.30% <100.00%> (+0.11%)	⬆️
common/types/matching.go	0.00% <ø> (ø)
service/frontend/api/handler.go	66.88% <100.00%> (+0.89%)	⬆️
service/matching/handler/handler.go	100.00% <100.00%> (ø)
service/matching/tasklist/task.go	78.33% <100.00%> (ø)
service/matching/handler/engine.go	79.89% <60.00%> (ø)

... and 33 files with indirect coverage changes

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[taylanisikdemir]

we may miss to update here when new fields are added. better to define From/To funcs and have unit tests.