migration: Add case to test auto-skipped disks

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XXXX-296262 - VM live migration with copy storage - auto-skipped disks

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Test result:

(1/6) type_specific.io-github-autotest-libvirt.migration_with_copy_storage.autoskipped_disks.cdrom_with_startuppolicy.optional.copy_storage_inc.local_storage.p2p: PASS (184.68 s) (2/6) type_specific.io-github-autotest-libvirt.migration_with_copy_storage.autoskipped_disks.cdrom_with_startuppolicy.optional.copy_storage_inc.shared_storage.p2p: PASS (222.76 s) (3/6) type_specific.io-github-autotest-libvirt.migration_with_copy_storage.autoskipped_disks.cdrom_with_startuppolicy.requisite.copy_storage_inc.local_storage.p2p: PASS (184.59 s) (4/6) type_specific.io-github-autotest-libvirt.migration_with_copy_storage.autoskipped_disks.cdrom_with_startuppolicy.requisite.copy_storage_inc.shared_storage.p2p: PASS (223.66 s) (5/6) type_specific.io-github-autotest-libvirt.migration_with_copy_storage.autoskipped_disks.cdrom_with_startuppolicy.mandatory.copy_storage_inc.local_storage.p2p: PASS (133.32 s) (6/6) type_specific.io-github-autotest-libvirt.migration_with_copy_storage.autoskipped_disks.cdrom_with_startuppolicy.mandatory.copy_storage_inc.shared_storage.p2p: PASS (226.19 s)

(1/2) type_specific.io-github-autotest-libvirt.migration_with_copy_storage.autoskipped_disks.cdrom_with_empty_source.copy_storage_inc.local_storage.p2p: PASS (183.31 s) (2/2) type_specific.io-github-autotest-libvirt.migration_with_copy_storage.autoskipped_disks.cdrom_with_empty_source.copy_storage_inc.shared_storage.p2p: PASS (223.59 s)

(1/2) type_specific.io-github-autotest-libvirt.migration_with_copy_storage.autoskipped_disks.disk_with_shareable.copy_storage_inc.local_storage.p2p: PASS (135.63 s) (2/2) type_specific.io-github-autotest-libvirt.migration_with_copy_storage.autoskipped_disks.disk_with_shareable.copy_storage_inc.shared_storage.p2p: PASS (222.87 s)