Add bluetooth integration (#74653)

Co-authored-by: Paulus Schoutsen <paulus@home-assistant.io>

tests/components/bluetooth/conftest.py

@@ -0,0 +1,25 @@
+"""Tests for the bluetooth component."""
+
+import threading
+
+import pytest
+
+from tests.common import INSTANCES
+
+
+@pytest.fixture(autouse=True)
+def verify_cleanup():
+    """Verify that the test has cleaned up resources correctly."""
+    threads_before = frozenset(threading.enumerate())
+
+    yield
+
+    if len(INSTANCES) >= 2:
+        count = len(INSTANCES)
+        for inst in INSTANCES:
+            inst.stop()
+        pytest.exit(f"Detected non stopped instances ({count}), aborting test run")
+
+    threads = frozenset(threading.enumerate()) - threads_before
+    for thread in threads:
+        assert isinstance(thread, threading._DummyThread)