Add functionality for tearing down inactive resources.

[sharkinsspatial]

The current Lambda stack contains both single use resources and chunk based cron jobs which should be disabled after they have processed a complete inventory. Both these resources should be removed by some process after they no longer need to execute.

[sharkinsspatial]

This is actually even more relevant given the fact that our AWSCustomResources use Cloudformation hooks internally and these are limited to 100 per account. We should include a base class for our functions that will be targets for InvokeFunction that includes logic to self-destruct. 😸