Add a log to report the ComputeJob Threadpool size and queue size information (apollographql#6662)

Author: theJC

Diff for: apollo-router/src/compute_job.rs

@@ -44,6 +44,11 @@ fn queue() -> &'static AgeingPriorityQueue<Job> {
                 }
             });
         }
+        tracing::info!(
+                "ComputeJob Threadpool created.  Threads:{} queue size:{}",
+                pool_size,
+                pool_size * QUEUE_SOFT_CAPACITY_PER_THREAD
+            );
         AgeingPriorityQueue::soft_bounded(QUEUE_SOFT_CAPACITY_PER_THREAD * pool_size)
     })
 }