[BUG] Typoscript := addToList() is broken in ext solrfal

[marc-munos]

Describe the bug
In solrfal, adding an item to plugin.tx_solr.index.enableFileIndexing.storageContext.1.folders with addToList() TS function has no effect.

To Reproduce
Steps to reproduce the behavior:

1. install solrfal and add the basic typoscript template to the root page of the site.
2. truncate the tx_solr_indexqueue_file table
3. create a folder foo in the FAL, (let say storageUid = 1)
4. add the following TS lines at the root page of the site :

plugin.tx_solr.index.enableFileIndexing = 1
plugin.tx_solr.index.enableFileIndexing.storageContext.1.folders := addToList(/foo)

5. add a file foo.txt in the /foo fal folder
6. error : have a look to the tx_solr_indexqueue_file table : the file was not added for indexation

Expected behavior
The file should have been added in tx_solr_indexqueue_file, as if the TS line had been :

plugin.tx_solr.index.enableFileIndexing = 1
plugin.tx_solr.index.enableFileIndexing.storageContext.1.folders = /foo

Screenshots
NA

Used versions (please complete the following information):

• TYPO3 Version: 12.4.20
• EXT:solr Version: 12.0.5
• EXT:solrfal Version: 12.0.2
• PHP Version: 8.2.0
• MySQL Version: NA
• Used Apache Solr : NA
• Browser : NA

Additional context
It works in typo3 v11.5.30, solr@11.0.5, solrfal@11.0.0