Define a spinnaker application using a pulumi dynamic provider

[danfhernandez]

Given a running spinnaker instance
When pulumi up is run
Then a new spinnaker application is created

Resources:

• Docs: https://www.pulumi.com/docs/intro/concepts/programming-model/#dynamicproviders
• An general example: https://github.com/pulumi/pulumi/blob/ad3b5e7ee88346bc7e960de9f953957a72f84516/sdk/nodejs/dynamic/index.ts#L109