Build oeo-closure only during release process

[l-emele]

Description of the issue

Currently, oeo-closure is built after every commit. This takes significant amount of time. Maybe it is enough, if oeo-closure is only built for pull requests to the master branch or after a release.

Ideas of solution

If you already have ideas for the solution describe them here

Workflow checklist

• [ ] I am aware of the workflow for this repository