[TFGPT2] - Fix flaky past_key_values test (#9460)

* fix tf flakey

* remove test files

tests/test_modeling_tf_gpt2.py

@@ -218,6 +218,11 @@ class TFGPT2ModelTester:
     ):
         model = TFGPT2Model(config=config)
 
+        input_ids = input_ids[:1, :]
+        input_mask = input_mask[:1, :]
+        token_type_ids = token_type_ids[:1, :]
+        self.batch_size = 1
+
         # first forward pass
         outputs = model(input_ids, attention_mask=input_mask, token_type_ids=token_type_ids, use_cache=True)
 
@@ -225,13 +230,13 @@ class TFGPT2ModelTester:
 
         # create hypothetical next token and extent to next_input_ids
         next_tokens = ids_tensor((self.batch_size, 3), config.vocab_size)
-        next_token_types = ids_tensor((self.batch_size, 3), self.type_vocab_size)
         next_attn_mask = ids_tensor((self.batch_size, 3), 2)
+        next_token_types = ids_tensor((self.batch_size, 3), self.type_vocab_size)
 
         # append to next input_ids and token_type_ids
         next_input_ids = tf.concat([input_ids, next_tokens], axis=-1)
-        next_token_type_ids = tf.concat([token_type_ids, next_token_types], axis=-1)
         next_attention_mask = tf.concat([input_mask, next_attn_mask], axis=-1)
+        next_token_type_ids = tf.concat([token_type_ids, next_token_types], axis=-1)
 
         output_from_no_past = model(
             next_input_ids, token_type_ids=next_token_type_ids, attention_mask=next_attention_mask