chore(auth): Revert fetchAuthSession changes

[mattcreaser]

• PR title and description conform to Pull Request guidelines.

Issue #, if available:

Description of changes:

• This PR temporarily reverts the changes in chore(auth): Fix failing integration tests #3032 and chore(auth): Refactor fetchAuthSession to useCase #3017. They will be reintroduced later after more thorough investigation of the best way to resolve state machine race conditions using the coroutine APIs.

How did you test these changes?
Integration tests should pass

Documentation update required?

• No
• Yes (Please include a PR link for the documentation update)

General Checklist

• Added Unit Tests
• Added Integration Tests
• Security oriented best practices and standards are followed (e.g. using input sanitization, principle of least privilege, etc)

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.