[RUN AS-IF-FOSS] Restrict incident list query to available fields

app/assets/javascripts/incidents/graphql/fragments/incident_fields.fragment.graphql

+fragment IncidentFields on Issue {
+  severity
+}

app/assets/javascripts/incidents/graphql/queries/get_incidents.query.graphql

+#import "ee_else_ce/incidents/graphql/fragments/incident_fields.fragment.graphql"
+
 query getIncidents(
   $projectPath: ID!
   $issueTypes: [IssueType!]
@@ -39,8 +41,7 @@ query getIncidents(
             webUrl
           }
         }
-        statusPagePublishedIncident
-        severity
+        ...IncidentFields
       }
       pageInfo {
         hasNextPage

changelogs/unreleased/tr-fix-incident-list-ce.yml

+---
+title: Fix incident list by restricting query on FOSS
+merge_request: 42301
+author:
+type: fixed

ee/app/assets/javascripts/incidents/graphql/fragments/incident_fields.fragment.graphql

+fragment IncidentFields on Issue {
+  severity
+  statusPagePublishedIncident
+}