Update pip install calls in scripts to use uv. And messages to reference current executable (#13597)

tests/runtests.py

@@ -124,7 +124,12 @@ def main() -> None:
         print("\nRunning pytype...")
         pytype_result = subprocess.run([sys.executable, "tests/pytype_test.py", path])
     else:
-        print(colored("\nSkipping pytype on Windows. You need to install it first: `pip install pytype`.", "yellow"))
+        print(
+            colored(
+                f"\nSkipping pytype on Windows. You need to install it first: `{sys.executable} -m pip install pytype` .",
+                "yellow",
+            )
+        )
 
     cases_path = test_cases_path(stub if folder == "stubs" else "stdlib")
     if not cases_path.exists():