Fix missing MARKER_END

Logging status of hipCtxSynchronize was missing
Test if hip profiling is active for MARKER_END in ihipPostLaunchKernel
Add MARKER_END after the completion of a kernel launched through
the "grid launch"

src/grid_launch.cpp

@@ -92,5 +92,8 @@ namespace hip_impl
 
         delete static_cast<L*>(locked_stream);
         locked_stream = nullptr;
+        if(HIP_PROFILE_API) {
+            MARKER_END();
+        }
     }
 }