Do not clean up GitHub Action workers if no Docker build is needed

[Quetzacoalt91]

Questions	Answers
Description?	Based on the run https://github.com/PrestaShop/docker/actions/runs/23484488854, each task of building a base or PrestaShop image takes ~2 minutes even when there is nothing to do. This is caused by the step jlumbroso/free-disk-space that frees space in order to the incoming Docker build to complete. However, 2 minutes * (83-5) jobs equals around 1h and a half (156 minutes) of wasted runners time. This PR adds conditions to avoid running steps that won't be needed, and will speed up the whole workflow.
Type?	improvement
BC breaks?	Nope
Deprecations?	Nope
Fixed ticket?	/
Sponsor company	@PrestaShopCorp
How to test?	Check time needed to complete (to be checked on a fork: https://github.com/Quetzacoalt91/docker/actions/runs/23496129187)

Original behavior:

Updated result: