ci: insert debian/x86_test-vk in image tags

ci: insert debian/x86_test-vk in image tags

Using the variable DEBIAN_X86_TEST_IMAGE_PATH in a Vulkan test, we realize the
reference to the Vulkan one is missing. Even more, hardcoded within mesa. With
this, a variable for Vulkan image has a reference VK on it, as well as the GL
one. But the old variable is still there, pointing to the value that can be
expected to avoid any brake on other CI elements.

Also, updated the build tag to regenerate the image.

Signed-off-by: Sergi Blanch Torne <sergi.blanch.torne@collabora.com>
Reviewed-by: David Heidelberg <david.heidelberg@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/19784>