feat: A new field upgradable_database_versions is added to message …

…`.google.cloud.sql.v1beta4.DatabaseInstance` (#7474)

* feat: A new field `upgradable_database_versions` is added to message `.google.cloud.sql.v1.DatabaseInstance`
feat: A new message `AvailableDatabaseVersion` is added
feat: A new value `UNSUPPORTED_EXTENSIONS_NOT_MIGRATED` is added to enum `SqlExternalSyncSettingErrorType`
feat: A new value `EXTENSIONS_NOT_MIGRATED` is added to enum `SqlExternalSyncSettingErrorType`
feat: A new value `PG_CRON_FLAG_ENABLED_IN_REPLICA` is added to enum `SqlExternalSyncSettingErrorType`
feat: A new value `POSTGRES_16` is added to enum `SqlDatabaseVersion`
feat: A new value `MYSQL_8_4_0` is added to enum `SqlDatabaseVersion`
docs: A comment for field `preferred_zone` in message `.google.cloud.sql.v1.CloneContext` is changed
docs: A comment for field `advanced_machine_features` in message `.google.cloud.sql.v1.Settings` is changed
PiperOrigin-RevId: 646631009
Source-Link: googleapis/googleapis@2bbcfb5
Source-Link: googleapis/googleapis-gen@784c8ea
Copy-Tag: eyJwIjoiU3FsQWRtaW4vLk93bEJvdC55YW1sIiwiaCI6Ijc4NGM4ZWFiMDkxMWJiNGI5MTJjMGZiZTJiMWNkZTc1MjU3ZWFjYzMifQ==

* feat: A new field `upgradable_database_versions` is added to message `.google.cloud.sql.v1beta4.DatabaseInstance`
feat: A new message `AvailableDatabaseVersion` is added
feat: A new value `UNSUPPORTED_EXTENSIONS_NOT_MIGRATED` is added to enum `SqlExternalSyncSettingErrorType`
feat: A new value `EXTENSIONS_NOT_MIGRATED` is added to enum `SqlExternalSyncSettingErrorType`
feat: A new value `PG_CRON_FLAG_ENABLED_IN_REPLICA` is added to enum `SqlExternalSyncSettingErrorType`
docs: A comment for field `advanced_machine_features` in message `.google.cloud.sql.v1beta4.Settings` is changed
PiperOrigin-RevId: 646632725
Source-Link: googleapis/googleapis@9a94427
Source-Link: googleapis/googleapis-gen@17db1f2
Copy-Tag: eyJwIjoiU3FsQWRtaW4vLk93bEJvdC55YW1sIiwiaCI6IjE3ZGIxZjIwYTdhZWFmNTA1NjEyNWMzMGM0M2RlMWI3YjdhMjRmMjkifQ==