[ENG-1459] Removes need to provide API key, server address when running locally

[vsreekanti]

Describe your changes and why you are making these changes

When running on the same machine as the Aqueduct server, the user shouldn't need to provide the API key or address of the server explicitly -- we should be able to automatically detect it. This PR makes the api_key and aqueduct_address arguments optional on the API client.

Related issue number (if any)

ENG-1459

Checklist before requesting a review

• I have created a descriptive PR title. The PR title should complete the sentence "This PR...".
• I have performed a self-review of my code.
• [N/A] I have included a small demo of the changes. For the UI, this would be a screenshot or a Loom video.
• [N/A] If this is a new feature, I have added unit tests and integration tests.
• I have run the integration tests locally and they are passing.
• I have run the linter script locally (See python3 scripts/run_linters.py -h for usage).
• [N/A] All features on the UI continue to work correctly.
• Added one of the following CI labels:
  • run_integration_test: Runs integration tests
  • skip_integration_test: Skips integration tests (Should be used when changes are ONLY documentation/UI)