Enhancements to task output

[mastersilv3r]

Currently there is no way to access output of the event handler and the last task that executed

• Set result of eventhandler and make available to on_response_validation_error and any subsequent middlewares
• Set FQN of a function or workflows as the id of the same. V2: Autocomplete and validationtion in ide, in events and yaml workflows #856
• Make the output of that function or workflow available under that id in ctx.outputs
• Final output of if/else and switch/case tasks Yaml should be available in the task ID #878