turnip: add a more complete format table

turnip: add a more complete format table

A format table is an array of tu_native_format.  Table lookup is
done through array indexing.

This commit defines a single format table for core VkFormat.  It is
derived from the table in the gallium driver.  There might be errors
introduced in the process of the conversion.

When an extension that defines new VkFormat is supported, we need to
add a new table for the extension.