fix(integrations): consider test metrics (#13888)

src/transformers/integrations.py

@@ -358,9 +358,13 @@ def rewrite_logs(d):
     new_d = {}
     eval_prefix = "eval_"
     eval_prefix_len = len(eval_prefix)
+    test_prefix = "test_"
+    test_prefix_len = len(test_prefix)
     for k, v in d.items():
         if k.startswith(eval_prefix):
             new_d["eval/" + k[eval_prefix_len:]] = v
+        elif k.startswith(test_prefix):
+            new_d["test/" + k[test_prefix_len:]] = v
         else:
             new_d["train/" + k] = v
     return new_d