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

tests/mypy_test.py

@@ -507,7 +507,7 @@ def setup_virtual_environments(distributions: dict[str, PackageDependencies], ar
         print(colored(f"took {venv_elapsed_time:.2f} seconds", "blue"))
 
     # STAGE 3: For each {virtual_environment: requirements_set} pairing,
-    # `pip install` the requirements set into the virtual environment
+    # `uv pip install` the requirements set into the virtual environment
     pip_start_time = time.perf_counter()
 
     # Limit workers to 10 at a time, since this makes network requests

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():