mcb-update-actions - Update matplotlib to latest version

[M-casado]

Ticket reference

NA

Overall changes

• Updated matplotlib to latest changes, to check that GH actions resolve correctly.

Future TO-DOs and checks

• Check that the object's versions (i.e. meta:version) are updated before creating the PR (see GitHub Action).
• Check that the version manifest is up to date right before merging (see documentation).

[M-casado]

Outcome of the PR:

• Fixed conflicting dependencies (matplotlib)
• Improved greatly the speed, and lowered consumption, of GH workflows by adding caching to most Python actions.
• Improved the validation reports by adding summaries of the execution.
• Spent a few hours figuring out where the errors were coming from, and in the end traced them back again to [BUG]: Failed to compile schema: async keyword in sync schema elixir-europe/biovalidator#57:
  • Local validation works, but when some schemas are given to Biovalidator as referenced (-r), and these schemas also use APIs (e.g., keyword graphRestriction), Biovalidator fails to compile the schemas and gives a cryptic message (e.g., {\"error\":\"Failed to compile schema: {}\"} - see https://github.com/EbiEga/ega-metadata-schema/actions/runs/9649515065/job/26613160012?pr=91)

In conclusion, the actions work, they work faster, and the reports are more comprehensive. But the local validation will keep failing with those schemas that use APIs.