Use gtest recommandation and provide global environment through main

Bigfoot/Tests/System/SystemTests/main.cpp

@@ -0,0 +1,19 @@
+/*********************************************************************
+ * \file   main.cpp
+ *
+ * \author Romain BOULLARD
+ * \date   May 2026
+ *********************************************************************/
+#include <Utils/Log/LogMacros.hpp>
+#include <Utils/TargetMacros.h>
+
+#include <gtest/gtest.h>
+
+int main(int argc, char** argv)
+{
+    testing::InitGoogleTest(&argc, argv);
+
+    BIGFOOT_NOT_OPTIMIZED_ONLY(::Bigfoot::Singleton<::Bigfoot::Log>::Lifetime m_lifetime);
+
+    return RUN_ALL_TESTS();
+}