Fix regression in telnet service

[thinkst-francois]

Proposed changes

A regression in the telnet service occured where the Realm/portal required by AuthenticatingTelnetProtocol in twisted was removed.

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• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update

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• Lint and unit tests pass locally with my changes (if applicable)
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[thinkst-francois]

Local tests:

2023-10-30T13:28:26+0000 [twisted.internet.protocol.ServerFactory#info] Starting factory <twisted.internet.protocol.ServerFactory object at 0x7feced277430>
{"dst_host": "192.168.5.157", "dst_port": 23, "honeycred": false, "local_time": "2023-10-30 13:28:33.402619", "local_time_adjusted": "2023-10-30 13:28:33.402648", "logdata": {"PASSWORD": "passworcd", "USERNAME": "admin"}, "logtype": 6001, "node_id": "opencanary-1", "src_host": "192.168.5.99", "src_port": 33128, "utc_time": "2023-10-30 13:28:33.402644"}
{"dst_host": "192.168.5.157", "dst_port": 23, "honeycred": true, "local_time": "2023-10-30 13:28:36.283700", "local_time_adjusted": "2023-10-30 13:28:36.283772", "logdata": {"PASSWORD": "password", "USERNAME": "admin"}, "logtype": 6001, "node_id": "opencanary-1", "src_host": "192.168.5.99", "src_port": 33128, "utc_time": "2023-10-30 13:28:36.283766"}