Fix Nextcloud 28 and Fulltextsearch

Hello all,

just a hint: I came from Elasticsearch 7.x to NC 28.0.4 with Elastic 8 and full text search did not work anymore.

occ fulltextsearch:test


occ fulltextsearch:index

did not work, no documents were indexed.
I had to do a

occ fulltextsearch:reset

and then index again to make it work again. I assume, that there were left overs from Elastic 7.
Maybe this helps.
KR Michael