chore(firestore): expose the Firestore.executePipeline API to the pre…

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docs(firestore): minor documentation updates to `StructuredQuery`
docs(firestore): minor documentation changes for `distance_threshold`

PiperOrigin-RevId: 731306872

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BEGIN_NESTED_COMMIT
feat(dialogflow/cx): added support for handlers
PiperOrigin-RevId: 731109606

Source-Link: https://github.com/googleapis/googleapis/commit/8ed13a08afe44525cb12e4ba89b6d3d452453c48

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BEGIN_NESTED_COMMIT
feat(dialogflow/cx): added support for playbook level speech settings
feat(dialogflow/cx): added support for answer feedback & latency metrics in conversation history
feat(dialogflow/cx): added DocumentProcessingMode & BoostSpec for data stores

PiperOrigin-RevId: 730930887

Source-Link: https://github.com/googleapis/googleapis/commit/fbbbf5023815f9a662c85aa8af8f3b72467fcb6f

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