Pass bindless feedback data to UI through vulkan pipeline state

* Each binding element within an arrayed descriptor has a bool indicating if
  it's dynamically used or not (which will be set to true if the feedback isn't
  available). Each descriptor has a uint32_t indicating how many elements are
  dynamically used - which is useful for the UI to hide the root of an array
  that has no used elements, or to heuristically decide whether to expand or
  elide the contents.

renderdoc/core/image_viewer.cpp

@@ -176,7 +176,7 @@ public:
     RDCEraseEl(ret);
     return ret;
   }
-  void SavePipelineState() {}
+  void SavePipelineState(uint32_t eventId) {}
   DriverInformation GetDriverInfo()
   {
     DriverInformation ret = {};