Fix for sqlalchemy 2 and text upgrades

[pjaol]

Description

Quick fix for task history logging and sqlalchemy 2.x

Motivation and Context

Using sqlalchemy 2.x breaks luigid if task history is enabled
e.g.

[task_history]
db_connection = sqlite:///./log/luigi-task-hist.sqlite

Results in luigid exiting

File ".../env/lib/python3.11/site-packages/luigi/db_task_history.py", line 271, in _upgrade_schema
    for i in conn.execute('PRAGMA table_info(task_parameters);').fetchall():
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File ".../env/lib/python3.11/site-packages/sqlalchemy/engine/base.py", line 1414, in execute
    raise exc.ObjectNotExecutableError(statement) from err
sqlalchemy.exc.ObjectNotExecutableError: Not an executable object: 'PRAGMA table_info(task_parameters);'

This is because sqlalchemy requires a sqlalchemy.text object vs string in conn.execute

Have you tested this? If so, how?

Tested locally with sqlite3 and sqlalchemy 2.0.23 and luigi 3.4.0

[pjaol]

Hey @dlstadther what can I do to help move this forward?
I'm not sure what to look at to increase the code cov test