Revert "create RequestBody struct, implement it using requests, add r…

[bowenxia]

…equestbody into Attribute for auditing (#5124)"

This reverts commit c462ec0.

What changed?
Reverted

Why?
Had bug when testing. Doing more testing.

How did you test it?

Potential risks

Release notes

Documentation Changes

[coveralls]

Pull Request Test Coverage Report for Build 0186c93d-4ce8-4e7b-a81e-5408369fa737

• 61 of 131 (46.56%) changed or added relevant lines in 2 files are covered.
• 148 unchanged lines in 14 files lost coverage.
• Overall coverage increased (+0.04%) to 57.162%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
service/frontend/accessControlledHandler.go	59	81	72.84%
service/frontend/accessControlledAdminHandler.go	2	50	4.0%

Files with Coverage Reduction	New Missed Lines	%
service/history/queue/timer_queue_processor_base.go	1	77.26%
service/history/task/transfer_active_task_executor.go	2	72.15%
service/matching/matcher.go	2	91.46%
common/persistence/statsComputer.go	3	94.64%
common/task/fifoTaskScheduler.go	3	84.54%
service/history/queue/timer_gate.go	3	95.83%
service/history/task/transfer_standby_task_executor.go	4	86.82%
common/persistence/nosql/nosqlplugin/cassandra/workflow.go	6	59.1%
common/persistence/serialization/parser.go	8	63.91%
common/persistence/serialization/thrift_decoder.go	8	57.14%

Totals
Change from base Build 0186c82d-bf3f-4ccd-97bb-e4ae87e88b45:	0.04%
Covered Lines:	85154
Relevant Lines:	148970

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💛 - Coveralls