PYTHON-6164 Exclude the drivers-evergreen-tools submodule from linting

[blink1073]

PYTHON-6164

Changes in this PR

Lint runs no longer scan the drivers-evergreen-tools submodule.

• Excluded the submodule from ruff and pre-commit.
• Dropped the stale py39 target-version; the rules it newly activates (UP035, UP041, ASYNC109, UP042, UP017, B905) are ignored rather than fixed.

Test Plan

No unit tests (config-only change). Validated with ruff check and ruff format --check (a scratch file inside the submodule is invisible to both), just lint, just lint-manual, and just typing.

Checklist

Checklist for Author

• Did you update the changelog (if necessary)? No: config-only change.
• Is there test coverage? See Test Plan.
• Is any followup work tracked in a JIRA ticket? If so, add link(s).

Checklist for Reviewer

• Does the title of the PR reference a JIRA Ticket?
• Do you fully understand the implementation? (Would you be comfortable explaining how this code works to someone else?)
• Is all relevant documentation (README or docstring) updated?