feat(firestore): update the api

#### firestore:v1

The following keys were added:
- schemas.GoogleFirestoreAdminV1Database.properties.earliestVersionTime (Total Keys: 3)
- schemas.GoogleFirestoreAdminV1Database.properties.pointInTimeRecoveryEnablement.type (Total Keys: 1)
- schemas.GoogleFirestoreAdminV1Database.properties.versionRetentionPeriod (Total Keys: 3)
- schemas.GoogleFirestoreAdminV1ExportDocumentsRequest.properties.snapshotTime (Total Keys: 2)

Author: yoshi-automation