Support for running async functions in sync functions

[FarukOzderim (Ömer Faruk Özdemir)]

Feature or enhancement
Support for running async functions in sync functions
Pitch
Currently only running async functions inside sync functions is only available with
asyncio.run(func(x)) or loop.run_until_complete(); however when there is a running loop, these calls cannot be used.
The only way is running the function in background, and using callback functions(which is very limiting)

event_loop = asyncio.get_event_loop()
task = event_loop.create_task(func(*args))
task.add_done_callback(callback_func)

See example PR

A bit Related:

Wrapping async functions for use in sync code

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