ES|QL: automatic prefiltering for semantic_text match queries

[ioanatia]

tracked in #123043

When using match with semantic_text fields that are backed by dense_vector embeddings, we should automatically apply pre-filters similarly to what we do for knn #131004.

The fact that we don't apply pre-filters right now constitutes a bug.

[elasticsearchmachine]

Pinging @elastic/es-search-relevance (Team:Search Relevance)