anv/meta: Use the uncompressed rectangle when blitting
anv/meta: Use the uncompressed rectangle when blitting

For an uncompressed ImageView of a compressed Image, the
dimensions and offsets are all divided by the appropriate
block dimensions.

We are not yet using an uncompressed ImageView for a
compressed Image, but will do so in a future commit.

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler