### Description

The current length limit for the `login` parameter in an HTTP connection is 500 characters. It'd be nice if this was 5000 characters like the `password` parameter.

### Use case/motivation

We've run into an issue with an API we need to integrate with. It uses basic HTTP authentication, and both username and password are about 900 characters long each. We don't have any control over this API, so we cannot change the authentication method, nor the length of these usernames and passwords.

### Related issues

_No response_

### Are you willing to submit a PR?

- [X] Yes I am willing to submit a PR!

### Code of Conduct

- [X] I agree to follow this project's [Code of Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)

"""Extra data. The value is decrypted/encrypted when reading/setting the value."""
        return synonym("_extra", descriptor=property(cls.get_extra, cls.set_extra))
    def rotate_fernet_key(self):
        """Encrypts data with a new key. See: :ref:`security/fernet`."""
        fernet = get_fernet()
        if self._password and self.is_encrypted:
            self._password = fernet.rotate(self._password.encode("utf-8")).decode()
        if self._extra and self.is_extra_encrypted:
            self._extra = fernet.rotate(self._extra.encode("utf-8")).decode()
    def get_hook(self, *, hook_params=None):
        """Return hook based on conn_type."""
        from airflow.providers_manager import ProvidersManager
        hook = ProvidersManager().hooks.get(self.conn_type, None)
        if hook is None:
            raise AirflowException(f'Unknown hook type "{self.conn_type}"')
        try:
            hook_class = import_string(hook.hook_class_name)
        except ImportError:
            warnings.warn(
                "Could not import %s when discovering %s %s",
                hook.hook_class_name,
                hook.hook_name,
                hook.package_name,
            )
            raise
        if hook_params is None:
            hook_params = {}
        return hook_class(**{hook.connection_id_attribute_name: self.conn_id}, **hook_params)
    def __repr__(self):