Use minijinja's pycompat mode for python methods

[mitsuhiko]

What does this PR do?

This PR updates the minijinja engine and enables the pycompat support. This makes minijinja support methods such as .strip() natively on methods and gets rid of the manual hacks with string replace.

While in practice the current mode probably does not create that many issues, this is cleaner and also adds support for other methods such as .title() or .lines().

Before submitting

• This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
• Did you read the contributor guideline,
  Pull Request section?
• Was this discussed/approved via a Github issue or the forum? Please add a link
  to it if that's the case.
• Did you make sure to update the documentation with your changes? Here are the
  documentation guidelines, and
  here are tips on formatting docstrings.
• Did you write any new necessary tests?

Who can review?

Tagging @OlivierDehaene from #1996 which touched these files last.

[drbh]

Hi @mitsuhiko thank you for this contribution! This is a nice improvement to minijinja and TGI.

I've opened another PR to run CI here #2054 and re ran the pre-commit command.

CI looks good and I'd be happy to approve this PR once/if those lints are resolved. Otherwise I'm also happy to merge the other PR if thats easier for you 🙂

Thanks!

[drbh]

closing in favor of #2054 which ran CI and updated lints