- Start sending the message from test connection exceptions instead of a generic exception with no message in it
    - Update the regex CONNECTION_DATABASE_PERMISSIONS_REGEX because google is sending the project name twice now
    - Update tests

- Add the original message ONLY for CONNECTION_DATABASE_PERMISSIONS_ERROR error types so we can keep using the default message for other cases used in other places like tests

- Raise the original DatabaseTestConnectionFailedError exception instead of a new one.
- Adding normalized_messages method in SupersetErrorsException since the to_dict is not useful for getting the right message to users

- Raise the original DatabaseConnectionFailedError from the test command with the right message when necessary
- Remove the unnecessary code changes to handle multiple errors or DatabaseTestConnectionFailedError exceptions

        - Send a SupersetErrorsException instead of Test one since in the future we will be raising just superset exceptions
        - Update testsq