Fix virtual_disks filedescriptor failure

[chunfuwen]

Fix virtual_disks filedescriptor failure
utils_disk.get_added_parts_by_path() will get duplicated address for one partition(pci and virto-pci)

instead it need use utils_disk.get_added_parts()

[chunfuwen]

previously failed log:

2023-09-14 07:45:23,596 utils_disk L1096 DEBUG| Partitions by path: ['pci-0000:04:00.0', 'virtio-pci-0000:04:00.0', 'pci-0000:04:00.0-part1', 'virtio-pci-0000:04:00.0-part1', 'pci-0000:04:00.0-part2', 'virtio-pci-0000:04:00.0-part2', 'pci-0000:04:00.0-part3', 'virtio-pci-0000:04:00.0-part3', 'pci-0000:07:00.0', 'virtio-pci-0000:07:00.0']
2023-09-14 07:45:23,596 utils_disk L1148 INFO | Added parts:['virtio-pci-0000:07:00.0', 'pci-0000:07:00.0']
2023-09-14 07:45:23,597 virtual_disks_fi L0054 DEBUG| Newly added partition(s) is: ['virtio-pci-0000:07:00.0', 'pci-0000:07:00.0']
2023-09-14 07:45:24,070 virsh L1595 DEBUG| Undefine VM avocado-vt-vm1
2023-09-14 07:45:24,090 virsh L1580 DEBUG| Define VM from /tmp/xml_utils_temp_tu6esbjp.xml
2023-09-14 07:45:24,125 stacktrace L0039 ERROR|
2023-09-14 07:45:24,125 stacktrace L0041 ERROR| Reproduced traceback from: /var/ci/libvirt-ci/runtest/avocado-vt/avocado-vt/avocado_vt/test.py:274
2023-09-14 07:45:24,126 stacktrace L0045 ERROR| Traceback (most recent call last):
2023-09-14 07:45:24,126 stacktrace L0045 ERROR| File "/var/lib/avocado/data/avocado-vt/virttest/test-providers.d/downloads/io-github-autotest-libvirt/libvirt/tests/src/virtual_disks/virtual_disks_filedescriptor.py", line 288, in run
2023-09-14 07:45:24,126 stacktrace L0045 ERROR| test.fail("Attached 1 virtual disk but got %s." % len(new_disks))
2023-09-14 07:45:24,126 stacktrace L0045 ERROR| File "/var/ci/libvirt-ci/runtest/avocado-vt/avocado/avocado/core/test.py", line 979, in fail
2023-09-14 07:45:24,126 stacktrace L0045 ERROR| raise exceptions.TestFail(message)
2023-09-14 07:45:24,126 stacktrace L0045 ERROR| avocado.core.exceptions.TestFail: Attached 1 virtual disk but got 2.
2023-09-14 07:45:24,126 stacktrace L0046 ERROR|

[chunfuwen]

Command 'virsh list' finished with 0 after 0.037459077s
cleaning libvirtd logs...
DATA (filename=output.expected) => NOT FOUND (data sources: variant, test, file)
DATA (filename=stdout.expected) => NOT FOUND (data sources: variant, test, file)
DATA (filename=stderr.expected) => NOT FOUND (data sources: variant, test, file)
PASS 1-type_specific.io-github-autotest-libvirt.virtual_disks.file_descriptor.coldplug.attach_disk.associate_flag_seclabel_default

[dzhengfy]

LGTM