Fix #2536: Add CREWAI_DISABLE_TELEMETRY environment variable

Co-Authored-By: Joe Moura <joao@crewai.com>

tests/telemetry/test_telemetry_disable.py

@@ -0,0 +1,27 @@
+import os
+import pytest
+from unittest.mock import patch
+
+from crewai.telemetry import Telemetry
+
+
+def test_telemetry_disabled_with_otel_sdk_disabled():
+    """Test that telemetry is disabled when OTEL_SDK_DISABLED is set to true."""
+    with patch.dict(os.environ, {"OTEL_SDK_DISABLED": "true"}):
+        telemetry = Telemetry()
+        assert telemetry.ready is False
+
+
+def test_telemetry_disabled_with_crewai_disable_telemetry():
+    """Test that telemetry is disabled when CREWAI_DISABLE_TELEMETRY is set to true."""
+    with patch.dict(os.environ, {"CREWAI_DISABLE_TELEMETRY": "true"}):
+        telemetry = Telemetry()
+        assert telemetry.ready is False
+
+
+def test_telemetry_enabled_by_default():
+    """Test that telemetry is enabled by default."""
+    with patch.dict(os.environ, {}, clear=True):
+        with patch("crewai.telemetry.telemetry.TracerProvider"):
+            telemetry = Telemetry()
+            assert telemetry.ready is True