[1LP][RFR] Fix SSA fixture for failing tests.

[sbulage]

Purpose or Intent

• This PR will fix calling of parametrized fixture.

• Error in tests:

Fixture "compare_linux_vm_data" called directly. Fixtures are not meant to be called directly,
but are created automatically when test functions request them as parameters.
See https://docs.pytest.org/en/latest/fixture.html for more information about fixtures, and
https://docs.pytest.org/en/latest/deprecations.html#calling-fixtures-directly about how to update your code.

PRT Run

{{pytest: cfme/tests/cloud_infra_common/test_vm_instance_analysis.py -k "test_ssa_compliance or test_ssa_schedule or test_ssa_vm" --use-provider vsphere65-nested --long-running -vvv}}

[sbulage]

PRT failures are not related to changes made in this PR.

[digitronik]

both fixtures are pytest factory fixtures. LGTM. As per latest pytest we can not call those directly.