storagedriver/s3: Optimize s3 Delete test cleanup.

(cherry picked from commit e4af4dc3a6da6da724e7cff18cf5b6da6ef2a3fd)
Signed-off-by: Collin Shoop <cshoop@digitalocean.com>

registry/storage/driver/s3-aws/s3_test.go

@@ -479,11 +479,11 @@ func TestDelete(t *testing.T) {
 			t.Fatalf("cleanup failed: %s", lastErr)
 		}
 	}
+	defer cleanup(objs)
 
 	for _, tc := range tcs {
 		t.Run(tc.name, func(t *testing.T) {
 			objs := init()
-			defer cleanup(objs)
 
 			err := driver.Delete(context.Background(), tc.delete)