This is a continuation of !9483, but without back-porting.
Instead of checking the driver's API version to figure out if a physical device
feature is available and enabled, or even more, instead of checking for enabled
extensions in the driver, this patch adds private functions in the physical
driver to get the availability and enabling of features such as sampler ycbrc
conversion, synchronization2, timeline semaphore and video maintenance1.
And these new functions are used internally in the GstVulkanOperation object,
and the private object GstVulkanDecoder.
This approach is computationally cheaper, simpler and precise.
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/9492>
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