fix: consider binding when running autocomplete functions

[fractal13]

Pull Request Type

• Feature addition
• [ X] Bugfix
• Documentation update
• Code refactor
• Tests improvement
• CI/CD pipeline enhancement
• Other: [Replace with a description]

Description

Autocomplete functions implemented as methods of a Client subclass are not called with binding to the client object. This causes the autocomplete call to raise an exception. This PR fixes the issue.

Changes

• Call autocomplete methods with object binding.

Related Issues

#1582

Test Scenarios

Issue #1582 has a script that demonstrates the failure before this patch, and success after this patch.

Python Compatibility

• [X ] I've ensured my code works on Python 3.10.x
• I've ensured my code works on Python 3.11.x

Checklist

• [ X] I've run the pre-commit code linter over all edited files
• [ X] I've tested my changes on supported Python versions
• I've added tests for my code, if applicable
• I've updated / added documentation, where applicable

There were no autocomplete tests prior to this, and I did not add any to the tests/ directory.
No documentation should need to be updated.