[BUGFIX] Make getHasChildNodeSelected recursive

[twojtylak]

What this pr does

Currently, the GetHasChildNodeSelected function in \ApacheSolrForTypo3\Solr\Domain\Search\ResultSet\Facets\OptionBased\Hierarchy\Node only checks whether a direct child is selected. With hierarchical filters, however, it makes sense to check whether any child is selected in this hierarchy branch. E.g. because this should be expanded in the frontend.

<f:if condition="{childNode.hasChildNodeSelected}">
  <f:variable name="detailsState" value="open" />
</f:if>

The PR implements this recursive check.

Fixes: #4155

[dkd-kaehm]

@twojtylak
I rebased it to current state of release-12.0.x.
Please use git reset --hard <your-remote-name>/fix/make-node-get-has-child-node-selected-recursive if you want to push something.

[dkd-kaehm]

The test fail because of changes in TYPO3 Fluid.