Fix typing hints and checks after pinecone 9.0.0 release

[jscheffl]

See failed CI tests in:

• https://github.com/apache/airflow/actions/runs/25607930556/job/75175232344?pr=66631
• https://github.com/apache/airflow/actions/runs/25608738814/job/75177310774?pr=66632

Release notes explicitly tell it is breaking:
https://github.com/pinecone-io/python-sdk/releases/tag/v9.0.0

Migration guide:
https://github.com/pinecone-io/python-sdk/blob/main/docs/migration/v9-migration.md

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[jscheffl]

Fixed in parallel (and better) via #66600