feat: [Spanner] Add Spanner location API (#8737)

* feat: Add Spanner location API

PiperOrigin-RevId: 833474957

Source-Link: googleapis/googleapis@7418c8b

Source-Link: https://github.com/googleapis/googleapis-gen/commit/f969a4a5ad997baf189c399316297d60a819885b
Copy-Tag: eyJwIjoiU3Bhbm5lci8uT3dsQm90LnlhbWwiLCJoIjoiZjk2OWE0YTVhZDk5N2JhZjE4OWMzOTkzMTYyOTdkNjBhODE5ODg1YiJ9

feat: Add Send and Ack mutations for Queues
feat: Add QueryAdvisorResult for query plan
docs: Update description for the BatchCreateSessionsRequest and Session
docs: Update description for the IsolationLevel

PiperOrigin-RevId: 832425466

Source-Link: googleapis/googleapis@0eeb1be

Source-Link: https://github.com/googleapis/googleapis-gen/commit/bae417925203e68c806d9f6bfe3c20ab3cbf5d86
Copy-Tag: eyJwIjoiU3Bhbm5lci8uT3dsQm90LnlhbWwiLCJoIjoiYmFlNDE3OTI1MjAzZTY4YzgwNmQ5ZjZiZmUzYzIwYWIzY2JmNWQ4NiJ9

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

---------

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: gcf-owl-bot[bot]

metadata/V1/Location.php

@@ -36,10 +36,10 @@
  *
  * @param string $formattedDatabase The database in which the new sessions are created. Please see
  *                                  {@see SpannerClient::databaseName()} for help formatting this field.
- * @param int    $sessionCount      The number of sessions to be created in this batch call.
- *                                  The API can return fewer than the requested number of sessions. If a
- *                                  specific number of sessions are desired, the client can make additional
- *                                  calls to `BatchCreateSessions` (adjusting
+ * @param int    $sessionCount      The number of sessions to be created in this batch call. At least
+ *                                  one session is created. The API can return fewer than the requested number
+ *                                  of sessions. If a specific number of sessions are desired, the client can
+ *                                  make additional calls to `BatchCreateSessions` (adjusting
  *                                  [session_count][google.spanner.v1.BatchCreateSessionsRequest.session_count]
  *                                  as necessary).
  */