tests: init gf and filter out fusion tests for support mode

Author: sbera77

tests/test-backend-ops.cpp

@@ -1454,13 +1454,20 @@ struct test_case {
         ggml_context_ptr ctx(ggml_init(params)); // smart ptr
         GGML_ASSERT(ctx);
 
+        gf = ggml_new_graph_custom(ctx.get(), graph_nodes, false);
+
         ggml_tensor * out = build_graph(ctx.get());
         current_op_name   = op_desc(out);
 
         if (!matches_filter(out, op_names_filter)) {
             return true;
         }
 
+        // Filter out fusion tests in support mode
+        if (run_whole_graph()) {
+            return true;
+        }
+
         bool supported = ggml_backend_supports_op(backend, out);
 
         std::string device_desc = ggml_backend_dev_description(ggml_backend_get_device(backend));