chore(main): release 6.72.0

[release-please[bot]]

:robot: I have created a release beep boop

6.72.0 (2024-07-16)

Features

• Add RESOURCE_EXHAUSTED to the list of retryable error codes (e859b29)
• Add field order_by in spanner.proto (e859b29)
• Add QueryCancellationAction message in executor protos (e859b29)
• Add SessionPoolOptions, SpannerOptions protos in executor protos (e859b29)
• Add support for multi region encryption config (e859b29)
• Enable hermetic library generation (#3129) (94b2a86)
• spanner: Add support for Cloud Spanner Scheduled Backups (e859b29)
• spanner: Adding EXPECTED_FULFILLMENT_PERIOD to the indicate instance creation times (with FULFILLMENT_PERIOD_NORMAL or FULFILLMENT_PERIOD_EXTENDED ENUM) with the extended instance creation time triggered by On-Demand Capacity Feature (e859b29)
• Support Read RPC OrderBy (#3180) (735bca5)

Bug Fixes

• SessionPoolOptions.Builder#toBuilder() skipped useMultiplexedSessions (#3197) (027f92c)

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