Use recreate_serial_console in virtio test

[hholoubk]

Refactor virtio test to use the recreate_serial_console parameter
instead of manually calling cleanup_serial_console() and
create_serial_console() before wait_for_serial_login().

This simplifies console management after VM start and device hotplug
operations in virtio page_per_vq testing.

Modified test file:

• virtio/virtio_page_per_vq.py: Console after VM start/device hotplug

The test handles console recreation after VM initialization where the
console needs to be properly set up for testing virtio device attributes.
Depends on: avocado-framework/avocado-vt#4248 (Merged)
Depends on: #6890

Reopened from closed #6607 (rebased onto current master).

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Reviewing files that changed from the base of the PR and between c96ab65 and 19714eb.

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• libvirt/tests/src/virtio/virtio_page_per_vq.py

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