code: def prometheus_client(prometheus_backend_port, otlp_collector):
      return PrometheusConnect(
          url=f"http://localhost:{prometheus_backend_port}",
          disable_ssl=True,
      )
  
file_path: jina/tests/integration/instrumentation/conftest.py
imports: import os
  import time
  import pytest
  from prometheus_api_client import PrometheusConnect
  from jina.helper import random_port
label_desc: Use image node_id 5 for calling a global function with example usage: prometheus_client(prometheus_backend_port, otlp_collector) and returns: PrometheusConnect