Unblock LLM(stream=True) to work with tools (#2582)

* feat: unblock LLM(stream=True) to work with tools

* feat: replace pytest-vcr by pytest-recording

1. pytest-vcr does not support httpx - which LiteLLM uses for streaming responses.
2. pytest-vcr is no longer maintained, last commit 6 years ago :fist::skin-tone-4:
3. pytest-recording supports modern request libraries (including httpx) and actively maintained

* refactor: remove @skip_streaming_in_ci

Since we have fixed streaming response issue we can remove this @skip_streaming_in_ci

---------

Co-authored-by: Lorenze Jay <63378463+lorenzejay@users.noreply.github.com>

tests/utilities/test_events.py

@@ -50,10 +50,13 @@ from crewai.utilities.events.tool_usage_events import (
     ToolUsageErrorEvent,
 )
 
-# Skip streaming tests when running in CI/CD environments
-skip_streaming_in_ci = pytest.mark.skipif(
-    os.getenv("CI") is not None, reason="Skipping streaming tests in CI/CD environments"
-)
+
+@pytest.fixture(scope="module")
+def vcr_config(request) -> dict:
+    return {
+        "cassette_library_dir": "tests/utilities/cassettes",
+    }
+
 
 base_agent = Agent(
     role="base_agent",
@@ -625,7 +628,6 @@ def test_llm_emits_call_failed_event():
         assert received_events[0].error == error_message
 
 
-@skip_streaming_in_ci
 @pytest.mark.vcr(filter_headers=["authorization"])
 def test_llm_emits_stream_chunk_events():
     """Test that LLM emits stream chunk events when streaming is enabled."""
@@ -650,7 +652,6 @@ def test_llm_emits_stream_chunk_events():
         assert "".join(received_chunks) == response
 
 
-@skip_streaming_in_ci
 @pytest.mark.vcr(filter_headers=["authorization"])
 def test_llm_no_stream_chunks_when_streaming_disabled():
     """Test that LLM doesn't emit stream chunk events when streaming is disabled."""