lavapipe: fix incorrect sv[] array size

lavapipe: fix incorrect sv[] array size

The sampler views array needs to be dimensioned by
PIPE_MAX_SHADER_SAMPLER_VIEWS, not PIPE_MAX_SAMPLERS.

This fixes out-of-bounds array writes when using more than 32
textures in a shader.

Also add some assertions to check array indexing elsewhere.
And change loop limits to be based on ARRAY_SIZE().

Signed-off-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Reviewed-By: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17062>