Inability to store some of `EmbeddedField`s

[pwalski]

Describe the bug
Named vectors support was implemented with an assumption that every EmbeddedField should be stored as an Qdrant named vector.

To Reproduce
Removing any of with_vector calls from store_multiple_vectors.rs example will result with an empty Qdrant collection.

Expected behavior
Removing vector from Qdrant storage config of above example should result with skipping suitable EmbeddedField vector.