[Bug]: Collection.get_model_fields emits warnings for Pydantic 2.11

[pmeier]

What happened?

Starting with Pydantic 2.11 released a little over a week ago, accessing pydantic.BaseModel().model_fields on the instance results in deprecation warnings:

import warnings

warnings.simplefilter("always")

import chromadb

chroma_client = chromadb.Client()
collection = chroma_client.get_or_create_collection(name="my_collection")

/home/philip/miniforge3/envs/ragna-dev/lib/python3.10/site-packages/chromadb/types.py:144: PydanticDeprecatedSince211: Accessing the 'model_fields' attribute on the instance is deprecated. Instead, you should access this attribute from the model class. Deprecated in Pydantic V2.11 to be removed in V3.0.
  return self.model_fields  # pydantic 2.x
/home/philip/miniforge3/envs/ragna-dev/lib/python3.10/site-packages/chromadb/types.py:144: PydanticDeprecatedSince211: Accessing the 'model_fields' attribute on the instance is deprecated. Instead, you should access this attribute from the model class. Deprecated in Pydantic V2.11 to be removed in V3.0.
  return self.model_fields  # pydantic 2.x
/home/philip/miniforge3/envs/ragna-dev/lib/python3.10/site-packages/chromadb/types.py:144: PydanticDeprecatedSince211: Accessing the 'model_fields' attribute on the instance is deprecated. Instead, you should access this attribute from the model class. Deprecated in Pydantic V2.11 to be removed in V3.0.
  return self.model_fields  # pydantic 2.x
/home/philip/miniforge3/envs/ragna-dev/lib/python3.10/site-packages/chromadb/types.py:144: PydanticDeprecatedSince211: Accessing the 'model_fields' attribute on the instance is deprecated. Instead, you should access this attribute from the model class. Deprecated in Pydantic V2.11 to be removed in V3.0.
  return self.model_fields  # pydantic 2.x

Versions

Chroma 1.0.0, pydantic 2.11

Relevant log output

[jairad26]

handling this as part of a type safety PR here
#4339