gh-109256: allocate opcode IDs for internal opcodes in their own range (#109269)

Author: iritkatriel

Doc/library/dis.rst

@@ -1611,8 +1611,8 @@ iterations of the loop.
    opcodes in the range [0,255] which don't use their argument and those
    that do (``< HAVE_ARGUMENT`` and ``>= HAVE_ARGUMENT``, respectively).
 
-   If your application uses pseudo instructions, use the :data:`hasarg`
-   collection instead.
+   If your application uses pseudo instructions or specialized instructions,
+   use the :data:`hasarg` collection instead.
 
    .. versionchanged:: 3.6
       Now every instruction has an argument, but opcodes ``< HAVE_ARGUMENT``