feat(plan): Adding detailed-exitcode option for plan

[ViBiOh]

Checklist

• [x] All new jobs, commands, executors, parameters have descriptions
• [ ] Examples have been added for any significant new features
• [ ] README has been updated, if necessary

Motivation, Related Issues

We want to add an approve step when doing terraform through CircleCI. But, no approve is necessary if there is nothing to change. Instead of parsing the plan's output, we want to rely on the status code of the plan to decide if next steps are required.

Description

terraform plan has an extra -detailed-exitcode that we pass as a configuration.

[ViBiOh]

cc @CircleCI-Public/orb-publishers

[medaminejridi]

same here

[ViBiOh]

Any review possible? cc @KyleTryon