(feat) NVIDIA connectors update (#17672)

...x-embeddings-nvidia/llama_index/embeddings/nvidia/base.py

...-embeddings-nvidia/llama_index/embeddings/nvidia/utils.py

...s/embeddings/llama-index-embeddings-nvidia/pyproject.toml

...mbeddings/llama-index-embeddings-nvidia/tests/conftest.py

...ings/llama-index-embeddings-nvidia/tests/test_base_url.py

...a-index-embeddings-nvidia/tests/test_embeddings_nvidia.py

...s/llama-index-llms-nvidia/llama_index/llms/nvidia/base.py

.../llama-index-llms-nvidia/llama_index/llms/nvidia/utils.py

...dex-integrations/llms/llama-index-llms-nvidia/poetry.lock

...-integrations/llms/llama-index-llms-nvidia/pyproject.toml

...tegrations/llms/llama-index-llms-nvidia/tests/conftest.py

...ations/llms/llama-index-llms-nvidia/tests/test_api_key.py

...tions/llms/llama-index-llms-nvidia/tests/test_base_url.py

...ns/llms/llama-index-llms-nvidia/tests/test_mode_switch.py

...rations/llms/llama-index-llms-nvidia/tests/test_nvidia.py

...s/llama-index-llms-nvidia/tests/test_structured_output.py

...lms/llama-index-llms-nvidia/tests/test_text-completion.py

...ia-rerank/llama_index/postprocessor/nvidia_rerank/base.py

...a-rerank/llama_index/postprocessor/nvidia_rerank/utils.py

...or/llama-index-postprocessor-nvidia-rerank/pyproject.toml