Add support for snmpsim-lextudio

[freddy36]

Ilya Etingof, the author of the original snmpsim/pysnmp projects passed away on 10-Aug-2022. His snmpsim version doesn't work anymore with the current python version (3.12). This adds compatibility for the https://github.com/lextudio/snmpsim fork, which works with python 3.12.

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Testers

If you would like to test this pull request then please run: ./scripts/github-apply <pr_id>, i.e ./scripts/github-apply 5926 After you are done testing, you can remove the changes with ./scripts/github-remove. If there are schema changes, you can ask on discord how to revert.

[freddy36]

~~Please note that the current PyPI release (1.1.0) contains a bug which breaks compatibility with librenms. The fix (https://github.com/lextudio/snmpsim/pull/2) is already merged and should make it into the next release.~~ Version 1.1.1 has been released.

[murrant]

Thanks @freddy36 are these the only changes needed?

[freddy36]

It works for me with these changes. I'm not sure how I installed it in the first place.