[ROCm][CI] Fix entrypoints tests and Python-only installation test on ROCm (#28979)

Signed-off-by: Andreas Karatzas <akaratza@amd.com>

tests/entrypoints/openai/test_chat.py

@@ -254,12 +254,11 @@ async def test_single_chat_session(client: openai.AsyncOpenAI, model_name: str):
         {"role": "system", "content": "you are a helpful assistant"},
         {"role": "user", "content": "what is 1+1?"},
     ]
-
     # test single completion
     chat_completion = await client.chat.completions.create(
         model=model_name,
         messages=messages,
-        max_completion_tokens=10,
+        max_completion_tokens=5,
         logprobs=True,
         top_logprobs=5,
     )
@@ -267,13 +266,14 @@ async def test_single_chat_session(client: openai.AsyncOpenAI, model_name: str):
     assert len(chat_completion.choices) == 1
 
     choice = chat_completion.choices[0]
+
     assert choice.finish_reason == "length"
     assert chat_completion.usage == openai.types.CompletionUsage(
-        completion_tokens=10, prompt_tokens=37, total_tokens=47
+        completion_tokens=5, prompt_tokens=37, total_tokens=42
     )
 
     message = choice.message
-    assert message.content is not None and len(message.content) >= 10
+    assert message.content is not None and len(message.content) >= 5
     assert message.role == "assistant"
     messages.append({"role": "assistant", "content": message.content})
 
@@ -282,7 +282,7 @@ async def test_single_chat_session(client: openai.AsyncOpenAI, model_name: str):
     chat_completion = await client.chat.completions.create(
         model=model_name,
         messages=messages,
-        max_completion_tokens=10,
+        max_completion_tokens=5,
     )
     message = chat_completion.choices[0].message
     assert message.content is not None and len(message.content) >= 0