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/projectfiles_test.py

@@ -1,10 +1,10 @@
 from __future__ import annotations
 
+import tomllib
 from textwrap import dedent
 
 import pytest
 
-from cibuildwheel._compat import tomllib
 from cibuildwheel.projectfiles import (
     get_requires_python_str,
     resolve_dependency_groups,