This PR adds some initial test utilities (fixtures and decorators) to the Python SDK.
In particular, two utilities have been added.

A @cloudpods decorator that can be used as follows:

@cloudpods(name="pod-name")
def test_something():
    # do something with the loaded state
    pass

A cloud pod with a given name is loaded before the test runs and the state of the container is reset at the end of the test execution.

A reset_state fixture that simply resets the state of the container after test execution.