Run tests against Turso DB

[JanJakes]

When Turso DB is more feature-complete, let's run the SQLite driver test suite also against Turso DB to evaluate the compatibility.

See:

• https://turso.tech/blog/turso-the-next-evolution-of-sqlite
• https://github.com/tursodatabase/turso
• https://github.com/tursodatabase/turso-client-php