Add tmp_path_factory methods to the docs (#8550)

* Add tmp_path_factory methods to the docs

Add the methods of tmp_path_factory to the docs.

Currently, only the class description appears in the docs.

* Add tmpdir_factory methods to the docs

Author: albertvillanova

doc/en/reference/reference.rst

@@ -594,6 +594,7 @@ tmp_path_factory
 ``tmp_path_factory`` is an instance of :class:`~pytest.TempPathFactory`:
 
 .. autoclass:: pytest.TempPathFactory()
+    :members:
 
 
 .. fixture:: tmpdir
@@ -617,6 +618,7 @@ tmpdir_factory
 ``tmp_path_factory`` is an instance of :class:`~pytest.TempdirFactory`:
 
 .. autoclass:: pytest.TempdirFactory()
+    :members:
 
 
 .. _`hook-reference`: