ansible-lint: Unset PYTHONPATH in wrapper

[wfdewith]

Description of changes

Since the update of ruamel.yaml to 0.17.32 (5330b05), ansible-lint is broken with the following error, when ran from a nix-shell:

Traceback (most recent call last):
  File "/nix/store/20wbbb8w5d95k23hyf417aqh85qjmzp9-ansible-lint-6.17.1/bin/.ansible-lint-wrapped", line 6, in <module>
    from ansiblelint.__main__ import _run_cli_entrypoint
  File "/nix/store/20wbbb8w5d95k23hyf417aqh85qjmzp9-ansible-lint-6.17.1/lib/python3.10/site-packages/ansiblelint/__main__.py", line 39, in <module>
    from ansiblelint import cli
  File "/nix/store/20wbbb8w5d95k23hyf417aqh85qjmzp9-ansible-lint-6.17.1/lib/python3.10/site-packages/ansiblelint/cli.py", line 29, in <module>
    from ansiblelint.yaml_utils import clean_json
  File "/nix/store/20wbbb8w5d95k23hyf417aqh85qjmzp9-ansible-lint-6.17.1/lib/python3.10/site-packages/ansiblelint/yaml_utils.py", line 15, in <module>
    import ruamel.yaml.events
ModuleNotFoundError: No module named 'ruamel.yaml'

I did some investigation, and it appears to have something to do with different versions of Python namespaces. I'm not very familiar with the Python packaging and module loading process, so that was as far as I got. @tjni has been working on this (see here), so I hope that he understands the problem better than I do. In any case, I found that unsetting the PYTHONPATH environment variable fixes the problem for ansible-lint so this PR does exactly that.

I think a better fix needs to be found in the future, but for now, this fix at least mitigates the issue.

In addition, since an update for ansible-lint was released in the meantime, this PR includes a version bump.

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandbox = true set in nix.conf? (See Nix manual)
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 23.11 Release Notes (or backporting 23.05 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

[tjni]

I'm sorry that this causes you pain. It's only on staging right now, but do you think #250830 would fix it?

[wfdewith]

Oh, that's great! I'll try it, and if it works I will change this PR to only include the update.

[wfdewith]

Closed in favor of #252021