feat: add StreamActivatedJobs

[dimastbk]

Fixes #464

https://docs.camunda.io/docs/self-managed/zeebe-deployment/zeebe-gateway/job-streaming/

[coveralls]

Pull Request Test Coverage Report for Build 13567342624

Details

• 53 of 66 (80.3%) changed or added relevant lines in 5 files are covered.
• No unchanged relevant lines lost coverage.
• Overall first build on poc-streamer at 95.658%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pyzeebe/grpc_internals/zeebe_adapter_base.py	3	4	75.0%
pyzeebe/grpc_internals/zeebe_job_adapter.py	9	10	90.0%
pyzeebe/worker/worker.py	9	12	75.0%
pyzeebe/worker/job_poller.py	22	30	73.33%
<!--	Total:	53	66

Totals
Change from base Build 13264340281:	95.7%
Covered Lines:	1344
Relevant Lines:	1405

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💛 - Coveralls