model : Nomic Embed Text V2 with Mixture-of-Experts (MoE) architecture (#12466)

model : Nomic Embed Text V2 with Mixture-of-Experts (MoE) architecture (#12466)

* Nomic Embed Text V2 with Mixture-of-Experts (MoE) architecture

- Adds MoE-based embedding model supporting multilingual embeddings.
- Selects architecture variant based on hyperparameter detection (MoE layers).
- Removes unnecessary subclass initialization checks for clarity.

https://www.nomic.ai/blog/posts/nomic-embed-text-v2

Co-authored-by: Jared Van Bortel <redacted>
* fix tokenizer

* don't rename this tensor

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Co-authored-by: Jared Van Bortel <redacted>