Deployment tests are failing with an SSL certificate error

[krassowski]

The deployments tests are failing:

`SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self-signed certificate (_ssl.c:1006)`

_____________________ ERROR at setup of test_dask_gateway ______________________
Traceback (most recent call last):
  File "/home/runnerx/miniconda3/envs/test/lib/python3.11/site-packages/urllib3/connectionpool.py", line [46](https://github.com/nebari-dev/nebari/actions/runs/9177179471/job/25234168892?pr=2475#step:20:47)7, in _make_request
    self._validate_conn(conn)
  File "/home/runnerx/miniconda3/envs/test/lib/python3.11/site-packages/urllib3/connectionpool.py", line 1099, in _validate_conn
    conn.connect()
  File "/home/runnerx/miniconda3/envs/test/lib/python3.11/site-packages/urllib3/connection.py", line 653, in connect
    sock_and_verified = _ssl_wrap_socket_and_match_hostname(
                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/runnerx/miniconda3/envs/test/lib/python3.11/site-packages/urllib3/connection.py", line 806, in _ssl_wrap_socket_and_match_hostname
    ssl_sock = ssl_wrap_socket(
               ^^^^^^^^^^^^^^^^
  File "/home/runnerx/miniconda3/envs/test/lib/python3.11/site-packages/urllib3/util/ssl_.py", line 465, in ssl_wrap_socket
    ssl_sock = _ssl_wrap_socket_impl(sock, context, tls_in_tls, server_hostname)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/runnerx/miniconda3/envs/test/lib/python3.11/site-packages/urllib3/util/ssl_.py", line [50](https://github.com/nebari-dev/nebari/actions/runs/9177179471/job/25234168892?pr=2475#step:20:51)9, in _ssl_wrap_socket_impl
    return ssl_context.wrap_socket(sock, server_hostname=server_hostname)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/runnerx/miniconda3/envs/test/lib/python3.11/ssl.py", line [51](https://github.com/nebari-dev/nebari/actions/runs/9177179471/job/25234168892?pr=2475#step:20:52)7, in wrap_socket
    return self.sslsocket_class._create(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/runnerx/miniconda3/envs/test/lib/python3.11/ssl.py", line 1104, in _create
    self.do_handshake()
  File "/home/runnerx/miniconda3/envs/test/lib/python3.11/ssl.py", line 1382, in do_handshake
    self._sslobj.do_handshake()
ssl.SSLCertVerificationError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self-signed certificate (_ssl.c:1006)

ERROR tests/tests_deployment/test_dask_gateway.py::test_dask_gateway - requests.exceptions.SSLError: HTTPSConnectionPool(host='github-actions.nebari.dev', port=443): Max retries exceeded with url: /hub/api/users/test-user/tokens (Caused by SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self-signed certificate (_ssl.c:1006)')))
ERROR tests/tests_deployment/test_dask_gateway.py::test_dask_gateway_cluster_options - requests.exceptions.SSLError: HTTPSConnectionPool(host='github-actions.nebari.dev', port=443): Max retries exceeded with url: /hub/api/users/test-user/tokens (Caused by SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self-signed certificate (_ssl.c:1006)')))
ERROR tests/tests_deployment/test_jupyterhub_ssh.py::test_simple_jupyterhub_ssh - requests.exceptions.SSLError: HTTPSConnectionPool(host='github-actions.nebari.dev', port=443): Max retries exceeded with url: /hub/api/users/test-user/tokens (Caused by SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self-signed certificate (_ssl.c:1006)')))
ERROR tests/tests_deployment/test_jupyterhub_ssh.py::test_print_jupyterhub_ssh - requests.exceptions.SSLError: HTTPSConnectionPool(host='github-actions.nebari.dev', port=443): Max retries exceeded with url: /hub/api/users/test-user/tokens (Caused by SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self-signed certificate (_ssl.c:1006)')))
ERROR tests/tests_deployment/test_jupyterhub_ssh.py::test_exact_jupyterhub_ssh - requests.exceptions.SSLError: HTTPSConnectionPool(host='github-actions.nebari.dev', port=443): Max retries exceeded with url: /hub/api/users/test-user/tokens (Caused by SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self-signed certificate (_ssl.c:1006)')))
ERROR tests/tests_deployment/test_jupyterhub_ssh.py::test_contains_jupyterhub_ssh - requests.exceptions.SSLError: HTTPSConnectionPool(host='github-actions.nebari.dev', port=443): Max retries exceeded with url: /hub/api/users/test-user/tokens (Caused by SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self-signed certificate (_ssl.c:1006)')))

I am also seeing this error in nebari-dev/argo-jupyter-scheduler#10 (comment). Any ideas on what might be the issue?

Originally posted by @krassowski in #2475 (comment)