Consistently use same default model

[svlandeg]

Description

Use the same default model for the llm factory and the llm_task factories, so that these are entirely equivalent:

llm = nlp.add_pipe("llm", config={"task": {"@llm_tasks": "spacy.NER.v3"}})

and

llm = nlp.add_pipe("llm_ner")

Corresponding documentation PR

NA

Types of change

fix

Checklist

• I confirm that I have the right to submit this contribution under the project's MIT license.
• I ran all tests in tests and usage_examples/tests, and all new and existing tests passed. This includes
  • all external tests (i. e. pytest ran with --external)
  • all tests requiring a GPU (i. e. pytest ran with --gpu)
• My changes don't require a change to the documentation, or if they do, I've added all required information.

[rmitsch]

LGTM, just one minor comment.

[rmitsch]

Should succeed after merging in develop.