sampling via pymc raises TypeError since pymc v5.20.1

[janfb]

see #1390 for details.

To fix this issue, we should check whether pymc made a new release and fixed the problem and then remove the fail mark from the tests here

sbi/tests/mcmc_test.py

Lines 188 to 196 in 4c1ffa2

	pytest.param(
	"nuts_pymc",
	marks=pytest.mark.xfail(
	condition=sys.version_info >= (3, 12),
	reason="Fails with pymc 5.20.1",
	strict=True,
	raises=TypeError,
	),
	),

and here

sbi/tests/posterior_sampler_test.py

Lines 30 to 36 in 4c1ffa2

	pytest.param(
	"nuts_pymc",
	marks=pytest.mark.xfail(
	condition=sys.version_info >= (3, 12),
	reason="Fails with pymc 5.20.1",
	raises=TypeError,
	),