Use uv whenever available in nox (#11802)

noxfile.py

@@ -20,6 +20,7 @@
  import tomli as tomllib # type: ignore[import-not-found,no-redef]
 
 nox.options.reuse_existing_virtualenvs = True
+nox.options.default_venv_backend = "uv|virtualenv"
 
 
 def install(
@@ -76,7 +77,10 @@ def tests(session: nox.Session) -> None:
  else:
  install(session, f".[{extras}]")
 
- session.run("pip", "list")
+ if session.venv_backend == "uv":
+ session.run("uv", "pip", "list")
+ else:
+ session.run("pip", "list")
 
  if session.name != "tests-nocoverage":
  cov_args = [
@@ -267,7 +271,7 @@ def rust(session: nox.Session) -> None:
  process_rust_coverage(session, rust_tests, prof_location)
 
 
-@nox.session(venv_backend="uv|venv")
+@nox.session
 def local(session):
  pyproject_data = load_pyproject_toml()
  install(session, "-e", "./vectors", verbose=False)