Fix api_filter to allow UUIDs

[lungj]

In the existing code, trying to filter by id leads to the id being turned into an int. However, UUIDs are actually non-integer strings, so, if anything, we should be checking that the value is a UUID.

However, I simply removed the checking entirely to preserve the behaviour of the example lookup with id=1 from the forked Netbox code.

As a result of the change, the original behaviour should be preserved as well as supporting this type of use:

{{ query('networktocode.nautobot.lookup', 'devices', api_filter='id=an_actual_uuid', api_endpoint=nautobot_endpoint, token=nautobot_token) }}