Enable RDC link Status feature

1.add link status APIs
   2.Add link status example for link status API usage


[ROCm/rdc commit: 29b6699b62]

projects/rdc/include/rdc/rdc.h

@@ -654,7 +654,7 @@ typedef enum {
 #define RDC_MAX_NUM_OF_LINKS 16
 
 typedef struct {
-  int32_t gpu_index;
+  uint32_t gpu_index;
   uint32_t num_of_links;                              // The size of the array link_states
   rdc_topology_link_type_t link_types;                // XGMI, PCIe, and so on
   rdc_link_state_t link_states[RDC_MAX_NUM_OF_LINKS];

projects/rdc/include/rdc_lib/impl/RdcEmbeddedHandler.h

@@ -147,9 +147,10 @@ class RdcEmbeddedHandler final : public RdcHandler {
   RdcWatchTablePtr watch_table_;
   RdcMetricsUpdaterPtr metrics_updater_;
   RdcPolicyPtr policy_;
+  RdcTopologyLinkPtr topologylink_;
   RdcConfigSettingsPtr config_handler_;
   std::future<void> updater_;
-  RdcTopologyLinkPtr topologylink_;
+  
 };
 
 }  // namespace rdc