v1.60.0

What's Changed

• Pin remaining unpinned deps by @nemacysts in #4375
• Wire AlertManager into MarkForDeploymentProcess; remove Splunk metric watcher by @nemacysts in #4360
• Build deploy group to AlertManager filter mapping by @nemacysts in #4363
• Add rollback filtering for Default PaaSTA Error Alerting by @nemacysts in #4366
• Add alertmanager rollback dry-run support by @nemacysts in #4367

Full Changelog: v1.59.7...v1.60.0