pinecone: Add embedding Inference Support (#24515)

**Description**

Add support for Pinecone hosted embedding models as
`PineconeEmbeddings`. Replacement for #22890

**Dependencies**
Add `aiohttp` to support async embeddings call against REST directly

- [x] **Add tests and docs**: If you're adding a new integration, please
include

Added `docs/docs/integrations/text_embedding/pinecone.ipynb`


- [x] **Lint and test**: Run `make format`, `make lint` and `make test`
from the root of the package(s) you've modified. See contribution
guidelines for more: https://python.langchain.com/docs/contributing/

Twitter: `gdjdg17`

---------

Co-authored-by: Erick Friis <erick@langchain.dev>

libs/partners/pinecone/tests/unit_tests/test_embeddings.py

@@ -0,0 +1,16 @@
+from langchain_core.utils import convert_to_secret_str
+
+from langchain_pinecone import PineconeEmbeddings
+
+API_KEY = convert_to_secret_str("NOT_A_VALID_KEY")
+MODEL_NAME = "multilingual-e5-large"
+
+
+def test_default_config() -> None:
+    e = PineconeEmbeddings(pinecone_api_key=API_KEY, model=MODEL_NAME)
+    assert e.batch_size == 96
+
+
+def test_custom_config() -> None:
+    e = PineconeEmbeddings(pinecone_api_key=API_KEY, model=MODEL_NAME, batch_size=128)
+    assert e.batch_size == 128