[rocprofiler-systems] Implement GTest/GMock integration for unit testing (#1777)

* googletest project set up

---------

Co-authored-by: Aleksandar Djordjevic <adjordje@amd.com>
Co-authored-by: Milan Radosavljevic <milan.radosavljevic@amd.com>

projects/rocprofiler-systems/source/tests/dummy.cpp

@@ -0,0 +1,3 @@
+#include <gtest/gtest.h>
+
+TEST(first, test) { ASSERT_TRUE(true); }