[BUG] Node getHasChildNodeSelected not recursive

[twojtylak]

Describe the bug
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.

To Reproduce
Steps to reproduce the behavior:

1. Create a hierarchical filter with more than 3 levels
2. Select 3 level child
3. {childNode.hasChildNodeSelected} on top level parent of selected child will return false

Expected behavior
GetHasChildNodeSelected should return if any child node is selected

Used versions (please complete the following information):

• TYPO3 Version: >= 12