Alerting: Extend PUT rule-group route to write the entire rule group rather than top-level fields only (#53078) (#53554)

* Wire up to full alert rule struct

* Extract group change detection logic to dedicated file

* GroupDiff -> GroupDelta for consistency

* Calculate deltas and handle backwards compatible requests

* Separate changes and insert/update/delete as needed

* Regenerate files

* Don't touch the DB if there are no changes

* Quota checking, delete unused file

* Mark modified records as provisioned

* Validation + a couple API layer tests

* Address linter errors

* Fix issue with UID assignment and rule creation

* Propagate top level group fields to all rules

* Tests for repeated updates and versioning

* Tests for quota and provenance checks

* Fix linter errors

* Regenerate

* Factor out some shared logic

* Drop unnecessary multiple nilchecks

* Use alternative strategy for rolling UIDs on inserted rules

* Fix tests, add back nilcheck, refresh UIDs during test

* Address feedback

* Add missing nil-check

(cherry picked from commit b198559225)

Co-authored-by: Alexander Weaver <weaver.alex.d@gmail.com>

pkg/services/ngalert/api/generated_base_api_provisioning.go

@@ -135,7 +135,7 @@ func (f *ProvisioningApiHandler) RoutePutAlertRuleGroup(ctx *models.ReqContext)
 	folderUIDParam := web.Params(ctx.Req)[":FolderUID"]
 	groupParam := web.Params(ctx.Req)[":Group"]
 	// Parse Request Body
-	conf := apimodels.AlertRuleGroupMetadata{}
+	conf := apimodels.AlertRuleGroup{}
 	if err := web.Bind(ctx.Req, &conf); err != nil {
 		return response.Error(http.StatusBadRequest, "bad request data", err)
 	}