Integration Test for Go CF Driver

[zjrgov]

🎫 Addresses issue: https://github.com/GSA-TTS/devtools-program/issues/198

🛠 Summary of changes

Adds an integration test that verifies the cf-driver-go is able to connect to cloud.gov and get an app list.

📜 Testing Plan

How would a peer test this work?

• You would need to first get a username & password for some space on cloud.gov that has at least one app.
• Then you add those credentials to ./runner/cf-driver-go/cg/testdata/.cg_creds in the style of the .sample there.
• Run make integration, which should give you an error and tell you what the []Apps JSON looks like.
• Copy that JSON over the last line for your testdata file and run make integration again, this time it should succeed.

[zjrgov]

FYI the workflow didn't trigger on this when I opened it because I accidentally used main as the branch. I'm going to delete the empty commit I made to test and then force push.

[zjrgov]

It occurs to me I should add those test steps to the README… will do that tomorrow morning.