intel_batch_decoder: disasm shaders when decoding states besides VS

intel_batch_decoder: disasm shaders when decoding states besides VS

Previously only 'decode_vs_state' would dump the referenced shader,
which meant we completely ignored every other shader when decoding
the '3DSTATE_PIPELINED_POINTERS' command.

Move the program disassembly logic from 'decode_vs_state' into a
common 'disasm_program_from_group' helper and call it from every
other decode_*_state function, too.

Signed-off-by: Daniil Tatianin <99danilt@gmail.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/19880>