Merge branch 'sh-fix-epic-date-updates' into 'master'

Fix epic dates not updating with subgroups

Closes #197495

See merge request gitlab-org/gitlab!23289

ee/app/assets/javascripts/epic/store/actions.js

@@ -130,7 +130,7 @@ export const requestEpicDateSaveFailure = ({ commit }, data) => {
 export const saveDate = ({ state, dispatch }, { dateType, dateTypeIsFixed, newDate }) => {
   const updateEpicInput = {
     iid: `${state.epicIid}`,
-    groupPath: state.groupPath,
+    groupPath: state.fullPath,
     [dateType === dateTypes.start ? 'startDateIsFixed' : 'dueDateIsFixed']: dateTypeIsFixed,
   };