### 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)

"""Password. The value is decrypted/encrypted when reading/setting the value."""
        return synonym("_password", descriptor=property(cls.get_password, cls.set_password))
    def get_extra(self) -> str:
        """Return encrypted extra-data."""
        if self._extra and self.is_extra_encrypted:
            fernet = get_fernet()
            if not fernet.is_encrypted:
                raise AirflowException(
                    f"Can't decrypt `extra` params for login={self.login}, "
                    f"FERNET_KEY configuration is missing"
                )
            extra_val = fernet.decrypt(bytes(self._extra, "utf-8")).decode()
        else:
            extra_val = self._extra
        if extra_val:
            self._validate_extra(extra_val, self.conn_id)
        return extra_val
    def set_extra(self, value: str):
        """Encrypt extra-data and save in object attribute to object."""
        if value:
            self._validate_extra(value, self.conn_id)
            fernet = get_fernet()
            self._extra = fernet.encrypt(bytes(value, "utf-8")).decode()
            self.is_extra_encrypted = fernet.is_encrypted
        else:
            self._extra = value
            self.is_extra_encrypted = False
    @declared_attr
    def extra(cls):