fix(diagnostic_graph_aggregator): fix uselessOverride warning (#7768)

* fix(diagnostic_graph_aggregator): fix uselessOverride warning

Signed-off-by: Ryuta Kambe <ryuta.kambe@tier4.jp>

* restore and suppress inline

Signed-off-by: Ryuta Kambe <ryuta.kambe@tier4.jp>

* style(pre-commit): autofix

---------

Signed-off-by: Ryuta Kambe <ryuta.kambe@tier4.jp>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: veqcc

system/diagnostic_graph_aggregator/src/common/graph/units.hpp

@@ -139,7 +139,7 @@ class ShortCircuitMaxUnit : public MaxUnit
   std::string type() const override { return unit_name::short_circuit_max; }
 
 private:
-  void update_status() override;
+  void update_status() override;  // cppcheck-suppress uselessOverride
 };
 
 class MinUnit : public NodeUnit