x86: Update the list of tests that we run in the Cirrus-CI

The new tests that have been added in commit bc0dd8bd
("x86/debug: Add single-step #DB + STI/MOVSS blocking tests")
require a fixed kernel which we don't have in the Cirrus-CI yet,
so let's disable the failing "debug" test for now.

The "pcid" test has been renamed to "pcid-enabled" in commit
cad94b13 ("x86: Add a 'pcid' group for the various PCID+INVPCID
permutations").

Some additional tests are working fine now, too (pcid-asymmetric, msr,
vmx_apic_passthrough_tpr_threshold_test, vmx_init_signal_test,
vmx_pf_exception_test, vmx_sipi_signal_test), likely since the update
to Fedora 35, so we can also enable them in the CI now.

Message-Id: <20220308123538.538575-1-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>