🆕 Support Global Alert Grouping

[kyub]

Please add support for Global Alert Grouping https://support.pagerduty.com/docs/global-alert-grouping

Global Alert Grouping reduces noise by using Content-Based Alert Grouping to group alerts across multiple technical services. Content-Based Alert Grouping identifies alerts that share an exact match on a set of chosen fields and groups them together. Grouped alerts mean fewer incidents and interruptions for responders, richer incident context, and lower resolution times.