feat(gkebackup): add smart scheduling (#9644)

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feat: add backup indexing
docs: remove the next id annotation
docs: add output only and optional api field behavior label
docs: update retention policy and cron schedule comment to include new constraints from smart scheduling

PiperOrigin-RevId: 618989341

Source-Link: https://togithub.com/googleapis/googleapis/commit/b8691edb3f1d3c1583aa9cd89240eb359eebe9c7

Source-Link: https://togithub.com/googleapis/googleapis-gen/commit/d5fd4fbaa1860872a42a43ed7ce79966247591cc
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BEGIN_NESTED_COMMIT
feat(aiplatform): Evaluation Service aiplatform v1beta1 initial release
PiperOrigin-RevId: 618922045

Source-Link: https://togithub.com/googleapis/googleapis/commit/b82095baef02e525bee7bb1c48911c33b66acdf0

Source-Link: https://togithub.com/googleapis/googleapis-gen/commit/e3e3a072d85f725736e6f53d30e8278873d7923d
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END_NESTED_COMMIT
BEGIN_NESTED_COMMIT
feat(networkmanagement): add new fields and enum values related to round-trip
docs: update a few outdated comments
PiperOrigin-RevId: 618911579

Source-Link: https://togithub.com/googleapis/googleapis/commit/efad09c9f0d46ae0786d810a88024363e06c6ca3

Source-Link: https://togithub.com/googleapis/googleapis-gen/commit/704c5930d16097a405d4c1defa554be20cbd0b06
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END_NESTED_COMMIT
BEGIN_NESTED_COMMIT
feat(firestore/apiv1): add Vector Index API
PiperOrigin-RevId: 618867415

Source-Link: https://togithub.com/googleapis/googleapis/commit/277145d108819fa30fbed3a7cbbb50f91eb6155e

Source-Link: https://togithub.com/googleapis/googleapis-gen/commit/adcd3076784b5ae4e53a7b9be15d7720c2c07de7
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END_NESTED_COMMIT