[tests] fix "Tester object has no attribute '_testMethodName'" (#34910)

* add more cases

* fix method not found in unittest

Signed-off-by: Lin, Fanli <fanli.lin@intel.com>

* fix more cases

* add more models

* add all

* no unittest.case

* remove for oneformer

* fix style

---------

Signed-off-by: Lin, Fanli <fanli.lin@intel.com>

tests/models/clap/test_feature_extraction_clap.py

@@ -53,7 +53,7 @@ def floats_list(shape, scale=1.0, rng=None, name=None):
 @require_torch
 @require_torchaudio
 # Copied from tests.models.whisper.test_feature_extraction_whisper.WhisperFeatureExtractionTester with Whisper->Clap
-class ClapFeatureExtractionTester(unittest.TestCase):
+class ClapFeatureExtractionTester:
     def __init__(
         self,
         parent,