Describe the bug
py domain: All :py:* roles can refer python objects even if objtype not matched.

To Reproduce

Both :py:meth: and :py:class: are converted into hyperlinks to .. py:function:: foo.

.. py:function:: foo

:py:meth:`foo`
:py:class:`foo`

Expected behavior
They fails to create hyperlinks for python object when objtype is different.

Your project
N/A

Screenshots
N/A

Environment info

• OS: Mac
• Python version: 3.8.2
• Sphinx version: 2.4.4
• Sphinx extensions: N/A