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.

Types of changes

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• [x] 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

Checklist

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• [ ] Lint and unit tests pass locally with my changes (if applicable)
• [ ] I have run pre-commit (pre-commit in the repo)
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] I have added necessary documentation (if appropriate)
• [x] Linked to the relevant github issue or github discussion

Further comments

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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"}