Some drivers need to know the full list of formats that can be used
when VK_IMAGE_CREATE_MUTABLE_FORMAT_BIT or
VK_IMAGE_CREATE_BLOCK_TEXEL_VIEW_COMPATIBLE_BIT is set (dozen needs
that at least). While VkImageFormatListCreateInfo is a nice way to
get the actual of formats the user intends to use at view creation time,
this paramter is optional, and when it's missing, we need to know the
full list of compatible formats if we want things to work properly.
Provide a helper that hides all the complexity and return a format list
even when VkImageFormatListCreateInfo is missing.
Reviewed-by: Jesse Natalie <jenatali@microsoft.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17339>
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