[ServiceBus] resolve received messages immediately when we got extra (Azure#23779)

The comments indicates that it is possible that we receive more messages than we ask for, and we want to return them. However, in current code we only resolve after max-wait-time-after-first message has passed once we have extra because of the length equality check, and during the wait time, more messages could still arrive.

This PR changes to remove immediately when we get what we ask for or more.

Author: jeremymeng

sdk/servicebus/service-bus/src/core/batchingReceiver.ts

@@ -459,9 +459,7 @@ export class BatchingReceiverLite {
         // silently dropped on the floor.
         if (brokeredMessages.length > args.maxMessageCount) {
           logger.warning(
-            `More messages arrived than were expected: ${args.maxMessageCount} vs ${
-              brokeredMessages.length + 1
-            }`
+            `More messages arrived than expected: ${args.maxMessageCount} vs ${brokeredMessages.length}`
           );
         }
       } catch (err: any) {
@@ -472,7 +470,7 @@ export class BatchingReceiverLite {
         );
         reject(errObj);
       }
-      if (brokeredMessages.length === args.maxMessageCount) {
+      if (brokeredMessages.length >= args.maxMessageCount) {
         this._finalAction!();
       }
     };