Filter children tree by worker version

Refs https://gitlab.com/arkindex/requests/-/issues/472

A new filter, similar to the filter by type should be available to filter the children displayed.

Once a worker version is selected, only the elements from this version should be displayed in the tree and on the image. This is needed to compare different worker versions outcomes.

As we don't have a lot of visual space on top of children tree, the new select should only appear when there are at least 2 worker versions involved.