Cleanup debugger files

- move debug_manager.cpp to different folder
- remove unnecessary include

Signed-off-by: Mateusz Hoppe <mateusz.hoppe@intel.com>

level_zero/core/source/debug_manager/debug_manager.cpp

@@ -0,0 +1,14 @@
+/*
+ * Copyright (C) 2020-2022 Intel Corporation
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ */
+
+#include "shared/source/debug_settings/debug_settings_manager.h"
+
+#include "level_zero/core/source/compiler_interface/l0_reg_path.h"
+
+namespace NEO {
+DebugSettingsManager<globalDebugFunctionalityLevel> DebugManager(L0::registryPath);
+}