SWDEV-448163 - Fix doxygen warnings

This is a first batch of doxygen warnings fixes.

Signed-off-by: Sebastian Luzynski <Sebastian.Luzynski@amd.com>
Change-Id: Iba81d08b15738f80d86626113026e8a7e9cab42b

catch/performance/kernelLaunch/hipLaunchKernel.cc

@@ -116,3 +116,8 @@ TEST_CASE("Performance_hipLaunchKernel") {
     SECTION("event-based timing") { RunBenchmark<KernelType::kLarge, kTimerTypeEvent>(sync); }
   }
 }
+
+/**
+ * End doxygen group kernelLaunch.
+ * @}
+ */