Change param name used for labels filtering

The default param of `label_name` can now be customized
and we now use just `labels` as this is what the backend
for Jira issues list expects.

app/assets/javascripts/vue_shared/components/sidebar/labels_select_vue/dropdown_value.vue

@@ -21,11 +21,14 @@ export default {
       'allowLabelRemove',
       'allowScopedLabels',
       'labelsFilterBasePath',
+      'labelsFilterParam',
     ]),
   },
   methods: {
     labelFilterUrl(label) {
-      return `${this.labelsFilterBasePath}?label_name[]=${encodeURIComponent(label.title)}`;
+      return `${this.labelsFilterBasePath}?${this.labelsFilterParam}[]=${encodeURIComponent(
+        label.title,
+      )}`;
     },
     scopedLabel(label) {
       return this.allowScopedLabels && isScopedLabel(label);

app/assets/javascripts/vue_shared/components/sidebar/labels_select_vue/labels_select_root.vue

@@ -81,6 +81,11 @@ export default {
       required: false,
       default: '',
     },
+    labelsFilterParam: {
+      type: String,
+      required: false,
+      default: 'label_name',
+    },
     dropdownButtonText: {
       type: String,
       required: false,
@@ -156,6 +161,7 @@ export default {
       labelsFetchPath: this.labelsFetchPath,
       labelsManagePath: this.labelsManagePath,
       labelsFilterBasePath: this.labelsFilterBasePath,
+      labelsFilterParam: this.labelsFilterParam,
       labelsListTitle: this.labelsListTitle,
       labelsCreateTitle: this.labelsCreateTitle,
       footerCreateLabelTitle: this.footerCreateLabelTitle,

ee/app/assets/javascripts/integrations/jira/issues_show/components/sidebar/jira_issues_sidebar_root.vue

 <script>
+import { labelsFilterParam } from 'ee/integrations/jira/issues_show/constants';
+
 import LabelsSelect from '~/vue_shared/components/sidebar/labels_select_vue/labels_select_root.vue';
 import Assignee from './assignee.vue';
 
@@ -29,6 +31,7 @@ export default {
       return (this.issue?.assignees || [])[0];
     },
   },
+  labelsFilterParam,
 };
 </script>
 
@@ -39,6 +42,7 @@ export default {
     <labels-select
       :selected-labels="issue.labels"
       :labels-filter-base-path="issuesListPath"
+      :labels-filter-param="$options.labelsFilterParam"
       variant="sidebar"
       class="block labels js-labels-block"
     >

ee/app/assets/javascripts/integrations/jira/issues_show/constants.js

@@ -9,3 +9,5 @@ export const issueStateLabels = {
   [issueStates.OPENED]: __('Open'),
   [issueStates.CLOSED]: __('Closed'),
 };
+
+export const labelsFilterParam = 'labels';