…NS name

feat: add new API to execute SQL statements
feat: add support for Free Trials
feat: add support to schedule maintenance
feat: additional field to set tags on a backup or cluster
feat: add more observability options on the Instance level
feat: add new API to perform a promotion or switchover on secondary instances
feat: support for obtaining the public ip addresses of an instance and enabling either inbound or outbound public ip
feat: add new API to list the databases in a project and location
feat: add optional field to keep extra roles on a user if it already exists
docs: various typo fixes, correcting the formatting, and clarifications on the request_id and validate_only fields in API requests and on the page_size when listing the database

PiperOrigin-RevId: 688544999

Source-Link: googleapis/googleapis@113ddfe

Source-Link: googleapis/googleapis-gen@14fa50e
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