[2.1.x] Fixed #29301 -- Added custom help formatter to BaseCommand class

This partially reverts c3055242c8.
Thanks Adam Johnson and Carlton Gibson for the reviews.
Backport of ce3351b950 from master.

tests/user_commands/management/commands/common_args.py

@@ -0,0 +1,16 @@
+from argparse import ArgumentError
+
+from django.core.management.base import BaseCommand, CommandError
+
+
+class Command(BaseCommand):
+    def add_arguments(self, parser):
+        try:
+            parser.add_argument('--version', action='version', version='A.B.C')
+        except ArgumentError:
+            pass
+        else:
+            raise CommandError('--version argument does no yet exist')
+
+    def handle(self, *args, **options):
+        return 'Detected that --version already exists'