GPU: Improve the do_static_compilation_ check coverage (2)

162a24e05d had to be reverted, since it
didn't take into account other types of dynamically generated
`ShaderCreateInfo` (external shaders like OCIO or Python ones).
This just marks `ShaderCreateInfo`s as generated by default and only
sets the ones from gpu_shader_create_info_list as non generated.

Pull Request: https://projects.blender.org/blender/blender/pulls/145128

source/blender/gpu/intern/gpu_shader.cc

@@ -660,6 +660,7 @@ Shader *ShaderCompiler::compile(const shader::ShaderCreateInfo &info, bool is_ba
 
   using namespace blender::gpu::shader;
   const_cast<ShaderCreateInfo &>(info).finalize();
+  BLI_assert(info.do_static_compilation_ || info.is_generated_);
 
   TimePoint start_time;
 

source/blender/gpu/intern/gpu_shader_create_info.cc

@@ -535,6 +535,8 @@ void gpu_shader_create_info_init()
   }
 
   for (ShaderCreateInfo *info : g_create_infos->values()) {
+    info->is_generated_ = false;
+
     info->builtins_ |= gpu_shader_dependency_get_builtins(info->vertex_source_);
     info->builtins_ |= gpu_shader_dependency_get_builtins(info->fragment_source_);
     info->builtins_ |= gpu_shader_dependency_get_builtins(info->geometry_source_);

source/blender/gpu/intern/gpu_shader_create_info.hh

@@ -687,6 +687,8 @@ struct ShaderCreateInfo {
   StringRefNull name_;
   /** True if the shader is static and can be pre-compiled at compile time. */
   bool do_static_compilation_ = false;
+  /** True if the shader is not part of gpu_shader_create_info_list. */
+  bool is_generated_ = true;
   /** If true, all additionally linked create info will be merged into this one. */
   bool finalized_ = false;
   /** If true, all resources will have an automatic location assigned. */