Refactor BiergartenDataGenerator to use dependency injection container

pipeline/src/data_generation/mock/load.cpp

@@ -1,15 +0,0 @@
-/**
- * @file data_generation/mock/load.cpp
- * @brief Provides MockGenerator initialization behavior, which is a no-op load
- * path that logs readiness without model resources.
- */
-
-#include <spdlog/spdlog.h>
-
-#include <string>
-
-#include "data_generation/mock_generator.h"
-
-void MockGenerator::Load(const std::string& /*modelPath*/) {
-   spdlog::info("[MockGenerator] No model needed");
-}