test/integration: don't check for deprecated Networks field

[thaJeztah]

• relates to api/types/swarm: remove deprecated ServiceSpec.Networks field moby/moby#51184 (comment)

These tests depended on the deprecated Spec.Networks field, which is no longer part of current API versions, causing the test to fail;

=================================== FAILURES ===================================
_____________ ServiceTest.test_create_service_with_custom_networks _____________
tests/integration/api_service_test.py:379: in test_create_service_with_custom_networks
assert 'Networks' in svc_info['Spec']
E   AssertionError: assert 'Networks' in {'Labels': {}, 'Mode': {'Replicated': {'Replicas': 1}}, 'Name': 'dockerpytest_a538894175d07404', 'TaskTemplate': {'Con...pec': {'Command': ['true'], 'Image': 'alpine:3.10', 'Isolation': 'default'}, 'ForceUpdate': 0, 'Runtime': 'container'}}
____________ ServiceTest.test_update_service_with_defaults_networks ____________
tests/integration/api_service_test.py:1128: in test_update_service_with_defaults_networks
assert 'Networks' in svc_info['Spec']
E   AssertionError: assert 'Networks' in {'Labels': {}, 'Mode': {'Replicated': {'Replicas': 1}}, 'Name': 'dockerpytest_6d8e30f359c0f5e', 'TaskTemplate': {'Cont...pec': {'Command': ['true'], 'Image': 'alpine:3.10', 'Isolation': 'default'}, 'ForceUpdate': 0, 'Runtime': 'container'}}
_____________ ServiceTest.test_update_service_with_network_change ______________
tests/integration/api_service_test.py:1333: in test_update_service_with_network_change
assert 'Networks' in svc_info['Spec']
E   AssertionError: assert 'Networks' in {'Labels': {}, 'Mode': {'Replicated': {'Replicas': 1}}, 'Name': 'dockerpytest_d4e23667cdbaf159', 'TaskTemplate': {'Con... {'Command': ['echo', 'hello'], 'Image': 'busybox', 'Isolation': 'default'}, 'ForceUpdate': 0, 'Runtime': 'container'}}
------- generated xml file: /src/bundles/test-docker-py/junit-report.xml -------
=========================== short test summary info ============================

[thaJeztah]

Ah, fun; probably test-certs / fixtures expired? Or something else?

==================================== ERRORS ====================================
_________ ERROR at setup of BuildTest.test_build_container_with_target _________
/usr/local/lib/python3.12/site-packages/urllib3/connectionpool.py:464: in _make_request
    self._validate_conn(conn)
/usr/local/lib/python3.12/site-packages/urllib3/connectionpool.py:1093: in _validate_conn
    conn.connect()
/usr/local/lib/python3.12/site-packages/urllib3/connection.py:790: in connect
    sock_and_verified = _ssl_wrap_socket_and_match_hostname(
/usr/local/lib/python3.12/site-packages/urllib3/connection.py:969: in _ssl_wrap_socket_and_match_hostname
    ssl_sock = ssl_wrap_socket(
/usr/local/lib/python3.12/site-packages/urllib3/util/ssl_.py:480: in ssl_wrap_socket
    ssl_sock = _ssl_wrap_socket_impl(sock, context, tls_in_tls, server_hostname)
/usr/local/lib/python3.12/site-packages/urllib3/util/ssl_.py:524: in _ssl_wrap_socket_impl
    return ssl_context.wrap_socket(sock, server_hostname=server_hostname)
/usr/local/lib/python3.12/ssl.py:455: in wrap_socket
    return self.sslsocket_class._create(
/usr/local/lib/python3.12/ssl.py:1041: in _create
    self.do_handshake()
/usr/local/lib/python3.12/ssl.py:1319: in do_handshake
    self._sslobj.do_handshake()
E   ssl.SSLCertVerificationError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: invalid CA certificate (_ssl.c:1010)

During handling of the above exception, another exception occurred:
/usr/local/lib/python3.12/site-packages/urllib3/connectionpool.py:787: in urlopen
    response = self._make_request(
/usr/local/lib/python3.12/site-packages/urllib3/connectionpool.py:488: in _make_request
    raise new_e
E   urllib3.exceptions.SSLError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: invalid CA certificate (_ssl.c:1010)