### 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)

to_revision = script.get_current_head()
        if to_revision == from_revision:
            print_happy_cat("No migrations to apply; nothing to do.")
            return
        if not _revision_greater(config, to_revision, from_revision):
            raise ValueError(
                f"Requested *to* revision {to_revision} is older than *from* revision {from_revision}. "
                "Please check your requested versions / revisions."
            )
        _revisions_above_min_for_offline(config=config, revisions=[from_revision, to_revision])
        _offline_migration(command.upgrade, config, f"{from_revision}:{to_revision}")
        return  
    errors_seen = False
    for err in _check_migration_errors(session=session):
        if not errors_seen:
            log.error("Automatic migration is not available")
            errors_seen = True
        log.error("%s", err)
    if errors_seen:
        exit(1)
    if not to_revision and not _get_current_revision(session=session):
        
        
        initdb(session=session, load_connections=False)
        return
    with create_global_lock(session=session, lock=DBLocks.MIGRATIONS):
        import sqlalchemy.pool
        log.info("Creating tables")
        val = os.environ.get("AIRFLOW__DATABASE__SQL_ALCHEMY_MAX_SIZE")
        try: