Neptune fix bug init run (#22836)

* [neptune] fix checkpoint bug with relative out_dir

* update imports

* reformat with black

* check neptune without imports

* fix typing-related issue

* run black on code

* use os.path.sep instead of raw \

* simplify imports and remove type annotation

* make ruff happy

* apply review suggestions

* replace run with with_id kwarg to run

* update imports to avoid deprecation warnings for the latest client

---------
Co-authored-by: kshitij12345 <kshitijkalambarkar@gmail.com>

src/transformers/integrations.py

@@ -1220,6 +1220,10 @@ class NeptuneCallback(TrainerCallback):
             self._run = None
 
     def _initialize_run(self, **additional_neptune_kwargs):
+        try:
+            from neptune import init_run
+            from neptune.exceptions import NeptuneMissingApiTokenException, NeptuneMissingProjectNameException
+        except ImportError:
             from neptune.new import init_run
             from neptune.new.exceptions import NeptuneMissingApiTokenException, NeptuneMissingProjectNameException
 
@@ -1245,7 +1249,7 @@ class NeptuneCallback(TrainerCallback):
                 return
 
             if self._run and not self._is_monitoring_run and not self._force_reset_monitoring_run:
-                self._initialize_run(run=self._run_id)
+                self._initialize_run(with_id=self._run_id)
                 self._is_monitoring_run = True
             else:
                 self._initialize_run()
@@ -1257,7 +1261,7 @@ class NeptuneCallback(TrainerCallback):
         else:
             if not self._run:
                 self._initialize_run(
-                    run=self._run_id,
+                    with_id=self._run_id,
                     capture_stdout=False,
                     capture_stderr=False,
                     capture_hardware_metrics=False,