* Refactor RequestBroker to support context aware use - introduction of BrokerContext
* Context aware extension for EventBroker, EventBoker support for native or external types
* Enhance MultiRequestBroker - similar to RequestBroker and EventBroker - with support for native and external types and context aware execution.
* Move duplicated and common code into broker_utils from event- request- and multi_request_brokers
* Change BrokerContext from random number to counter
* Apply suggestion from @Ivansete-status
Co-authored-by: Ivan FB <128452529+Ivansete-status@users.noreply.github.com>
* Adjust naming in broker tests
* Follow up adjustment from send_api use
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Co-authored-by: Ivan FB <128452529+Ivansete-status@users.noreply.github.com>
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