Add support for Actions Environment Secret Management

[hosom]

Resolves #1611

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Before the change?

• Endpoints for environment secrets within Actions were not supported.

After the change?

• All of the actions_secret methods have been mapped to equivalents that support environments.
  • get_actions_environment_public_key
  • list_actions_environment_secrets
  • get_actions_environment_secret
  • create_or_update_actions_environment_secret
  • delete_actions_environment_secret

Pull request checklist

• Tests for the changes have been added (for bug fixes / features)
• Docs have been reviewed and added / updated if needed (for bug fixes / features)

Does this introduce a breaking change?

No breaking changes here!

Please see our docs on breaking changes to help!

• Yes
• No

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[kfcampbell]

Build failures appear to be linting related. Once that's addressed and the commented tests are addressed, I can get this merged and released!

[hosom]

My bad on the commented tests. I forgot to uncomment those when I went to add credentials and record for vcr. I've resolved the tests and linter issues.

[kfcampbell]

Thank you for contributing! I'll get this merged and released shortly.