Bench test use grpc

[subhash-veluru]

What changed?
Made bench workers to use grpc instead of tchannel transport, and changed development.yaml in config/bench to use 7833 port.

Why?
Since the thrift port is getting deprecated, it reduces the overhead of exposing thrift port of cadence service while bench testing.

How did you test it?
I tested this locally and workers started, All test cases passed. Since its a small change I didn't add test case.

Potential risks
There is no risks for main code as it only changes bench client connection.

Release notes
No it doesn't require anything.

Documentation Changes
Updated Readme in this PR itself

[subhash-veluru]

Hi @taylanisikdemir
How to trigger the build for this?

[natemort]

I've kicked off the build, it requires manual approval per PR for anyone outside of our organization.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.31%. Comparing base (fb4bfce) to head (2b8684c).
Report is 58 commits behind head on master.

Additional details and impacted files

see 3 files with indirect coverage changes

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[coveralls]

Pull Request Test Coverage Report for Build 018fa548-5231-4e13-87bc-1b6eddb17b19

Details

• 0 of 3 (0.0%) changed or added relevant lines in 1 file are covered.
• 95 unchanged lines in 19 files lost coverage.
• Overall coverage decreased (-0.05%) to 69.26%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
bench/lib/client.go	0	3	0.0%

Files with Coverage Reduction	New Missed Lines	%
common/task/weighted_round_robin_task_scheduler.go	2	89.05%
service/matching/tasklist/db.go	2	73.23%
common/persistence/execution_manager.go	2	86.43%
common/persistence/sql/sqlplugin/mysql/task.go	2	73.68%
service/history/task/transfer_active_task_executor.go	2	72.72%
common/persistence/statsComputer.go	2	97.14%
common/persistence/sql/sqlplugin/mysql/db.go	2	79.49%
common/log/tag/tags.go	3	50.46%
service/matching/tasklist/task_list_manager.go	3	75.89%
service/history/queue/timer_queue_processor_base.go	3	77.87%

Totals
Change from base Build 018fa464-40c9-4742-b88d-967555b43b81:	-0.05%
Covered Lines:	102043
Relevant Lines:	147334

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💛 - Coveralls