gh-91818: Use default program name in the CLI of many modules (GH-124867)

As argparse now detects by default when the code was run as a module.

This leads to using the actual executable name instead of simply "python"
to display in the usage message ("usage: python -m ...").

Lib/tokenize.py

@@ -510,7 +510,7 @@ def main():
         sys.exit(1)
 
     # Parse the arguments and options
-    parser = argparse.ArgumentParser(prog='python -m tokenize')
+    parser = argparse.ArgumentParser()
     parser.add_argument(dest='filename', nargs='?',
                         metavar='filename.py',
                         help='the file to tokenize; defaults to stdin')