Consider exposing sync functions through the same module using a decorator

[namsnath]

Sync versions of functions are defined in separate modules, and require maintaining a separate set of functions with identical signatures.

There is a possibility to explore using a decorator to expose sync versions of functions as properties.
Example:

@support_sync
async def some_fn():
  pass

await some_fn()
some_fn.sync()

Rough decorator setup:

def support_sync(fn):
  fn.sync = sync(fn)

Types can be inferred from the input fn.

[namsnath]

Implemented in #583