zink: add zink_program::uses_shobj for managing shader object binds

this is going to be more flexible than just checking for separable+EXT

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22725>

src/gallium/drivers/zink/zink_draw.cpp

@@ -278,7 +278,7 @@ update_gfx_pipeline(struct zink_context *ctx, struct zink_batch_state *bs, enum
    else
       zink_gfx_program_update(ctx);
    bool pipeline_changed = false;
-   if (ctx->curr_program->is_separable && screen->info.have_EXT_shader_object) {
+   if (ctx->curr_program->base.uses_shobj) {
       if (BATCH_CHANGED || shaders_changed || !ctx->shobj_draw) {
          VkShaderStageFlagBits stages[] = {
             VK_SHADER_STAGE_VERTEX_BIT,

src/gallium/drivers/zink/zink_program.c

@@ -1157,6 +1157,7 @@ create_gfx_program_separable(struct zink_context *ctx, struct zink_shader **stag
    prog->ctx = ctx;
    prog->is_separable = true;
    prog->gfx_hash = ctx->gfx_hash;
+   prog->base.uses_shobj = screen->info.have_EXT_shader_object;
 
    prog->stages_remaining = prog->stages_present = ctx->shader_stages;
    memcpy(prog->shaders, stages, sizeof(prog->shaders));

src/gallium/drivers/zink/zink_types.h

@@ -955,6 +955,7 @@ struct zink_program {
    struct zink_batch_usage *batch_uses;
    bool is_compute;
    bool can_precompile;
+   bool uses_shobj; //whether shader objects are used; programs CANNOT mix shader objects and shader modules
 
    struct zink_program_descriptor_data dd;