Observability Improvement

[schammah]

With the plugin we would like to provide an experience and have our users get most of the data through spinnaker and avoid having them going back and forth between AWS Console & Spinnaker.
We can achieve that by improving the observability with the plugin.

Currently the plugin lacks of visibility for the customer deploying a lambda:

• no logging are provided (console logs during execution in route stage i.e.: execution times, memory usage during execution & the rest of the logs)
• AWS API responses are not transmitted back to the users in spinnaker
• Functions UI - missing metrics