Lightweight template CI

[avishniakov]

Describe changes

I fixed issues with OS Space in Template CI action.

Diff is a bit messy, but the gist is:

• Remove setup environment step, as it is already done as part of tests run
• Clean-up leftovers from tests
• Update template

Skipping full CI, tested action isolatedly: https://github.com/zenml-io/zenml/actions/runs/6483599288/job/17605563335?pr=1930

Pre-requisites

Please ensure you have done the following:

• I have read the CONTRIBUTING.md document.
• If my change requires a change to docs, I have updated the documentation accordingly.
• If I have added an integration, I have updated the integrations table and the corresponding website section.
• I have added tests to cover my changes.
• I have based my new branch on develop and the open PR is targeting develop. If your branch wasn't based on develop read Contribution guide on rebasing branch to develop.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Other (add details above)

[github-actions]

E2E template updates in examples/e2e have been pushed.