Changes

This PR brings up the check for a SQLite URI within the _apply_driver_defaults function to allow for earlier detection of if the database should run in-memory.

It adds a test to check that a database file is not created when using a SQLite URI filename for an in-memory database.

• fixes Using SQLite URI filename format for in-memory database still creates a file #1314

Checklist:

• Add tests that demonstrate the correct behavior of the change. Tests should fail without the change.
• Add or update relevant docs, in the docs folder and in code.
• Add an entry in CHANGES.rst summarizing the change and linking to the issue.
• Add .. versionchanged:: entries in any relevant code docs.
• Run pre-commit hooks and fix any issues.
• Run pytest and tox, no tests failed.