CI: fix prometheus concurrent restart

[678098]

• Start 2 independent prometheus instances (push, pull)
• Move prometheus CI configs to CI folder

Fixes the following CI error

Run /home/runner/work/blazingmq/blazingmq/src/plugins/bmqprometheus/tests/bmqprometheus_prometheusstatconsumer_test.py -p /home/runner/work/blazingmq/blazingmq/build/blazingmq -m push --no-docker
Traceback (most recent call last):
  File "/home/runner/work/blazingmq/blazingmq/src/plugins/bmqprometheus/tests/bmqprometheus_prometheusstatconsumer_test.py", line 366, in <module>
    sys.exit(main(parse_arguments()))
             ^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/runner/work/blazingmq/blazingmq/src/plugins/bmqprometheus/tests/bmqprometheus_prometheusstatconsumer_test.py", line 2[4](https://github.com/bloomberg/blazingmq/actions/runs/30564764931/job/90946514631?pr=1670#step:15:5)4, in main
    results[f"local_cluster_test_with_{mode}_mode"] = test_local_cluster(
                                                      ^^^^^^^^^^^^^^^^^^^
  File "/home/runner/work/blazingmq/blazingmq/src/plugins/bmqprometheus/tests/bmqprometheus_prometheusstatconsumer_test.py", line 169, in test_local_cluster
    response = _make_request(
               ^^^^^^^^^^^^^^
  File "/home/runner/work/blazingmq/blazingmq/src/plugins/bmqprometheus/tests/bmqprometheus_prometheusstatconsumer_test.py", line 26[5](https://github.com/bloomberg/blazingmq/actions/runs/30564764931/job/90946514631?pr=1670#step:15:6), in _make_request
    conn.request("GET", url)
  File "/usr/lib/python3.12/http/client.py", line 1365, in request
    self._send_request(method, url, body, headers, encode_chunked)
  File "/usr/lib/python3.12/http/client.py", line 1411, in _send_request
    self.endheaders(body, encode_chunked=encode_chunked)
  File "/usr/lib/python3.12/http/client.py", line 13[6](https://github.com/bloomberg/blazingmq/actions/runs/30564764931/job/90946514631?pr=1670#step:15:7)0, in endheaders
    self._send_output(message_body, encode_chunked=encode_chunked)
  File "/usr/lib/python3.12/http/client.py", line 1120, in _send_output
    self.send(msg)
  File "/usr/lib/python3.12/http/client.py", line 1064, in send
    self.connect()
  File "/usr/lib/python3.12/http/client.py", line 1030, in connect
    self.sock = self._create_connection(
                ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/socket.py", line 852, in create_connection
    raise exceptions[0]
  File "/usr/lib/python3.12/socket.py", line 83[7](https://github.com/bloomberg/blazingmq/actions/runs/30564764931/job/90946514631?pr=1670#step:15:8), in create_connection
    sock.connect(sa)
ConnectionRefusedError: [Errno 111] Connection refused