Fix resource based tuner metrics missing temporal_ prefix (#2710)

Author: Sushisource

temporal-sdk/src/main/java/io/temporal/worker/MetricsType.java

@@ -191,8 +191,12 @@ private MetricsType() {}
   // Resource tuner
   //
   // Tagged with namespace & task_queue
-  public static final String RESOURCE_MEM_USAGE = "resource_slots_mem_usage";
-  public static final String RESOURCE_CPU_USAGE = "resource_slots_cpu_usage";
-  public static final String RESOURCE_MEM_PID = "resource_slots_mem_pid_output";
-  public static final String RESOURCE_CPU_PID = "resource_slots_cpu_pid_output";
+  public static final String RESOURCE_MEM_USAGE =
+      TEMPORAL_METRICS_PREFIX + "resource_slots_mem_usage";
+  public static final String RESOURCE_CPU_USAGE =
+      TEMPORAL_METRICS_PREFIX + "resource_slots_cpu_usage";
+  public static final String RESOURCE_MEM_PID =
+      TEMPORAL_METRICS_PREFIX + "resource_slots_mem_pid_output";
+  public static final String RESOURCE_CPU_PID =
+      TEMPORAL_METRICS_PREFIX + "resource_slots_cpu_pid_output";
 }