### 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)

import time
import warnings
from dataclasses import dataclass
from tempfile import gettempdir
from typing import TYPE_CHECKING, Callable, Generator, Iterable
from sqlalchemy import (
    Table,
    and_,
    column,
    delete,
    exc,
    func,
    inspect,
    literal,
    or_,
    select,
    table,
    text,
    tuple_,
)
import airflow
from airflow import settings
from airflow.configuration import conf
from airflow.exceptions import AirflowException
from airflow.models import import_all_models
from airflow.utils import helpers
from airflow.utils.session import NEW_SESSION, create_session, provide_session  
if TYPE_CHECKING:
    from alembic.runtime.environment import EnvironmentContext
    from alembic.script import ScriptDirectory