glsl: fix corruption due to blake3 hash not being set for nir_opt_undef

NIR is generated sooner, so we need to set it sooner.
This fixes Viewperf13/CATIA_car_04.

Fixes: cbfc225e2b - glsl: switch to a full nir based linker

Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/32876>

src/compiler/glsl/gl_nir_linker.c

@@ -2882,7 +2882,8 @@ link_intrastage_shaders(void *mem_ctx,
 
    /* Set the linked source BLAKE3. */
    if (num_shaders == 1) {
-      memcpy(linked->linked_source_blake3, shader_list[0]->compiled_source_blake3,
+      memcpy(linked->Program->nir->info.source_blake3,
+             shader_list[0]->compiled_source_blake3,
              BLAKE3_OUT_LEN);
    } else {
       struct mesa_blake3 blake3_ctx;
@@ -2895,7 +2896,7 @@ link_intrastage_shaders(void *mem_ctx,
          _mesa_blake3_update(&blake3_ctx, shader_list[i]->compiled_source_blake3,
                              BLAKE3_OUT_LEN);
       }
-      _mesa_blake3_final(&blake3_ctx, linked->linked_source_blake3);
+      _mesa_blake3_final(&blake3_ctx, linked->Program->nir->info.source_blake3);
    }
 
    return linked;

src/mesa/main/shader_types.h

@@ -246,9 +246,6 @@ struct gl_linked_shader
 {
    gl_shader_stage Stage;
 
-   /** All gl_shader::compiled_source_blake3 combined. */
-   blake3_hash linked_source_blake3;
-
    struct gl_program *Program;  /**< Post-compile assembly code */
 
    /**

src/mesa/state_tracker/st_glsl_to_nir.cpp

@@ -546,9 +546,6 @@ st_link_glsl_to_nir(struct gl_context *ctx,
             prog->nir->info.label = ralloc_strdup(shader, shader_program->Label);
       }
 
-      memcpy(prog->nir->info.source_blake3, shader->linked_source_blake3,
-             BLAKE3_OUT_LEN);
-
       nir_shader_gather_info(prog->nir, nir_shader_get_entrypoint(prog->nir));
       if (!st->ctx->SoftFP64 && ((prog->nir->info.bit_sizes_int | prog->nir->info.bit_sizes_float) & 64) &&
           (options->lower_doubles_options & nir_lower_fp64_full_software) != 0) {