MNTHGCU type report use groupPk param

https://dev.wormwood.com.sg/zentao/task-view-750.html

Strides-Admin/src/views/report/ReportV2.vue

@@ -142,10 +142,8 @@
         </el-select>
         <el-select
           clearable
-          multiple
-          collapse-tags
           v-show="filter.pageVo.reportType == 'MNTHGCU'"
-          v-model="filter.pageVo.groupPks"
+          v-model="filter.pageVo.groupPk"
           class="filter-input"
           placeholder="Groups">
           <el-option
@@ -280,6 +278,7 @@ export default {
           startMonth: "",
           endMonth: "",
           reportType: '',
+          groupPk: "",
           sitePks: [],
           groupPks: [],
           providerPks: []