util: Initialize pipe_shader_state for passthrough and transform shaders

util: Initialize pipe_shader_state for passthrough and transform shaders

mesa/st is initializing pipe_shader_state for user define shaders.
This patch intialized pipe_shader_state for all passthough
and transform shaders.

This fixes crashes for several opengl apps. Issue is found in vmware
internal testing

Fixes: f01c0565bb9 ("draw: free the NIR IR.")

Reviewed-by: Charmaine Lee <charmainel@vmware.com>
Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5240>