Revert fspath deprecation

It is not clear yet how we should proceed with this deprecation
because `pytest.Item.reportinfo` is public API and returns a `py.path` object,
and is not clear how plugins and our examples should handle that.

Reverting just the deprecation aspect of #8251 so we can get a 7.0.0 release out.

We will reintroduce the deprecation later once we have a clear path moving forward with replacing `reportinfo`.

Closes #8445
Closes #8821

testing/python/fixtures.py

@@ -967,8 +967,7 @@ class TestRequestBasic:
         (item,) = pytester.genitems([modcol])
         req = fixtures.FixtureRequest(item, _ispytest=True)
         assert req.path == modcol.path
-        with pytest.warns(pytest.PytestDeprecationWarning):
-            assert req.fspath == modcol.fspath
+        assert req.fspath == modcol.fspath
 
     def test_request_fixturenames(self, pytester: Pytester) -> None:
         pytester.makepyfile(