[Feature Request] Implement hydra.utils.get_object to locate arbitrary object.

[Jasha10]

The hydra.utils.get_class and hydra.utils.get_method functions are useful to look up python objects based on dot-paths.

>>> import hydra
>>> hydra.utils.get_method("numpy.float32")
<class 'numpy.float32'>

Internally, these functions use the same mechanism as the hydra.utils.instantiate function.

These two functions fail when looking up an object that is not a type and is not callable:

>>> hydra.utils.get_method("tensorflow.float16")
...
ValueError: Invalid type (<class 'tensorflow.python.framework.dtypes.DType'>) found for tensorflow.float16

I propose a hydra.utils.get_object function that has the same behavior as get_class and get_method but is more permissive with regard to non-callable objects.

For a motivating use-case, see this stackoverflow post.

[Zekrom-7780]

@Jasha10 , please can I work on this issue?

[Jasha10]

@Zekrom-7780 thank you for volunteering -- this feature has already been implemented (PR #2520).
I will close this issue now.