Fix Python version requirement and exclude BUILD files (#11267)

llama-index-cli/poetry.lock

llama-index-cli/pyproject.toml

llama-index-core/pyproject.toml

llama-index-experimental/poetry.lock

llama-index-experimental/pyproject.toml

llama-index-finetuning/poetry.lock

llama-index-finetuning/pyproject.toml

...rations/agent/llama-index-agent-openai-legacy/poetry.lock

...ions/agent/llama-index-agent-openai-legacy/pyproject.toml

...x-integrations/agent/llama-index-agent-openai/poetry.lock

...ntegrations/agent/llama-index-agent-openai/pyproject.toml

...egrations/callbacks/llama-index-callbacks-aim/poetry.lock

...ations/callbacks/llama-index-callbacks-aim/pyproject.toml

...tions/callbacks/llama-index-callbacks-argilla/poetry.lock

...ns/callbacks/llama-index-callbacks-argilla/pyproject.toml

...callbacks/llama-index-callbacks-arize-phoenix/poetry.lock

...lbacks/llama-index-callbacks-arize-phoenix/pyproject.toml

...ions/callbacks/llama-index-callbacks-deepeval/poetry.lock

...s/callbacks/llama-index-callbacks-deepeval/pyproject.toml

...ons/callbacks/llama-index-callbacks-honeyhive/poetry.lock