renderer_opengl: Use LOG_DEBUG for GL_DEBUG_SEVERITY_NOTIFICATION and GL_DEBUG_SEVERITY_LOW logs

LOG_TRACE is only enabled on debug builds which can be quite slow when
trying to debug graphics issues. Instead we can log the messages to the
debug log, which is available on both release and debug builds.

src/video_core/renderer_opengl/renderer_opengl.cpp

@@ -432,7 +432,7 @@ static void APIENTRY DebugHandler(GLenum source, GLenum type, GLuint id, GLenum
         break;
     case GL_DEBUG_SEVERITY_NOTIFICATION:
     case GL_DEBUG_SEVERITY_LOW:
-        LOG_TRACE(Render_OpenGL, format, str_source, str_type, id, message);
+        LOG_DEBUG(Render_OpenGL, format, str_source, str_type, id, message);
         break;
     }
 }