Update CI/CD pipeline to speed up checks on PRs not altering the Python package

[diegoferigo]

Partially reverts the changes of #93, as commented in #93 (comment).

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📚 Documentation preview 📚: https://jaxsim--128.org.readthedocs.build//128/

[traversaro]

Which this changes, are the schedule and workflow_dispatch jobs actually testing something? I am worried that we are going to ignore environment regressions (due to packages being updated) until users actually try to do pip install jaxsim.

[diegoferigo]

Which this changes, are the schedule and workflow_dispatch jobs actually testing something? I am worried that we are going to ignore environment regressions (due to packages being updated) until users actually try to do pip install jaxsim.

I think that this PR does not alter those events. The condition is always true for events different from pull_request, regardless to the filtering:

jaxsim/.github/workflows/ci_cd.yml

Lines 134 to 138 in b83264e

	- name: Run the Python tests
	if: |
	contains(matrix.os, 'ubuntu') &&
	(github.event_name != 'pull_request' ||
	steps.changes.outputs.all == 'true')

[traversaro]

Ah, It was not clear to me that the only effect of the new step was just setting steps.changes.outputs.all, ok for me then.