Incorrect condition in test_io masks Modin bug

[vnlitvinov]

In debugging the CI failure, I think I found another issue -- this check is supposed to be about Pandas v2, according to #6072, but it is actually checking the Modin version.

modin/modin/pandas/test/test_io.py

Lines 1478 to 1483 in f994aca

	if (
	version.parse(pa.__version__) >= version.parse("12.0.0")
	and version.parse(pd.__version__) < version.parse("2.0.0")
	and engine == "pyarrow"
	):
	pytest.xfail("incompatible versions; see #6072")

I believe this is covering up a Modin bug having to do with period range indices.

Originally posted by @zmbc in #6442 (comment)

I had verified that, when condition is rectified, the issue manifests on Ray engine (but does not manifest on Python engine!)

[vnlitvinov]

cc @anmyachev