Tests: Use monkeypatch.context to avoid side effects on pytest

[parona-source]

• Otherwise this mocked attribute would affect pytest negatively when running tests with --verbose.

See-Also: https://github.com/dbcli/mycli/pull/1152#issuecomment-2027036256

Description

https://github.com/dbcli/mycli/pull/1152 had a side effect of breaking pytest when invoked with --verbose, this pr use monkeypatch.context so that setattr doesnt affect pytest itself.

Checklist

• [ ] I've added this contribution to the changelog.md.
• [x] I've added my name to the AUTHORS file (or it's already there).

[parona-source]

Test fixes aren't included in the changelog I presume?

Don't see any explicit note about what contribution should be listed in the changelog but it appears test fixes aren't included.