Undo potentially confusing name change in packaging.

This method was named reinitialize_command in distutils and accompanied
by a comment suggesting to change it to get_reinitialized_command.
Following that, I did the change for distutils2, but it proved
confusing: The Distribution object has an internal cache of command
objects, to make sure only one instance is ever used, and the name
get_reinitialized_command could suggest that the object returned was
independent of that cache, which it was not.  I’m reverting the name
change to make code clearer.
diff --git a/Lib/packaging/command/cmd.py b/Lib/packaging/command/cmd.py
index 1053ac3..a88df02 100644
--- a/Lib/packaging/command/cmd.py
+++ b/Lib/packaging/command/cmd.py
@@ -318,8 +318,8 @@
         cmd_obj.ensure_finalized()
         return cmd_obj
 
-    def get_reinitialized_command(self, command, reinit_subcommands=False):
-        return self.distribution.get_reinitialized_command(
+    def reinitialize_command(self, command, reinit_subcommands=False):
+        return self.distribution.reinitialize_command(
             command, reinit_subcommands)
 
     def run_command(self, command):