fix python 3.12 threading issue in the tests by cleaning up otel components in _reset_mocks

Author: jj22ee

aws-opentelemetry-distro/tests/amazon/opentelemetry/distro/patches/test_instrumentation_patch.py

@@ -960,6 +960,19 @@ def _reset_mocks(self):
         for method_patch in self.method_patches.values():
             method_patch.reset_mock()
 
+        # Clean up OpenTelemetry components
+        try:
+            from opentelemetry import metrics
+            from opentelemetry.sdk.metrics import MeterProvider
+
+            # Force shutdown of any active metric readers
+            meter_provider = metrics.get_meter_provider()
+            if hasattr(meter_provider, "shutdown") and isinstance(meter_provider, MeterProvider):
+                meter_provider.shutdown()
+        except Exception:
+            # Ignore cleanup errors
+            pass
+
 
 def _do_extract_kinesis_attributes() -> Dict[str, str]:
     service_name: str = "kinesis"