feat: use python3.11+ for cibuildwheel driver (#1912)

* chore: use SPEC 0 schedule for cibuildwheel

* remove support for {python} and {pip} in commands

* Remove specific Python versions from the update-dependencies job

The requirements pinning is done by uv now, so we don't need to
run the versions of Python to do the pinning anymore.

---------

Co-authored-by: Joe Rickerby <joerick@mac.com>

unit_test/validate_schema_test.py

@@ -1,13 +1,12 @@
 from __future__ import annotations
 
 import re
+import tomllib
 from pathlib import Path
 
 import pytest
 import validate_pyproject.api
 
-from cibuildwheel._compat import tomllib
-
 DIR = Path(__file__).parent.resolve()