#3509 [Core feature] Improved error message with maptasks: using it within a task should error out Issue created by cosmicBboy ### Motivation: Why do you think this is important? Flytekit should raise a runtime error when map tasks are written in any of the following contexts: • When a user tries to write a

map_task

within a

task

function body @task def t1(): map_task(...)(...) • When a user tries to define a

map_task

at the module-level scope @map_task @task def t1(): ... or @task def t1(): ... my_map_task = map_task()(t1) ### Goal: What should the final outcome look like, ideally? The error should make it clear that `map_task`s can only be defined in workflow function bodies. ### Describe alternatives you've considered NA ### Propose: Link/Inline OR Additional context No response ### Are you sure this issue hasn't been raised already? • Yes ### Have you read the Code of Conduct? • Yes flyteorg/flyte