feat: specify readable ids for pci enable/disable fixture

Instead of ambiguous True/False use PCI/MMIO to better describe
the underlying Firecracker device transport layer.

Signed-off-by: Egor Lazarchuk <[email protected]>

Author: ShadowCurse

tests/conftest.py

@@ -588,7 +588,7 @@ def mem_size_mib():
     return 256
 
 
-@pytest.fixture(params=[True, False])
+@pytest.fixture(params=[True, False], ids=["PCI_ON", "PCI_OFF"])
 def pci_enabled(request):
     """Fixture that allows configuring whether a microVM will have PCI enabled or not"""
     yield request.param