Replace darglint with darglint2

[arneso-ssb]

Darglint is used in pre-commit checks for ensuring Google-style docstrings stay up to date with the source code. The original darglint repo is no longer maintained and is archived. But there is a fork, darglint2, which is maintained and published to PyPI.

The template should replace the use of darglint with darglint2, or another tool that has the same functionality.