Fix missing "Clear" button on namespace search

Adds `value` prop to component, which
ensures clear button appears.

Changelog: fixed

app/assets/javascripts/jira_connect/components/groups_list.vue

@@ -89,6 +89,7 @@ export default {
       debounce="500"
       :placeholder="__('Search by name')"
       :is-loading="isLoadingMore"
+      :value="searchTerm"
       @input="onGroupSearch"
     />
 

spec/frontend/jira_connect/components/groups_list_spec.js

@@ -160,9 +160,13 @@ describe('GroupsList', () => {
           expect(findGroupsList().classes()).toContain('gl-opacity-5');
         });
 
-        it('sets loading prop of ths search box', () => {
+        it('sets loading prop of the search box', () => {
           expect(findSearchBox().props('isLoading')).toBe(true);
         });
+
+        it('sets value prop of the search box to the search term', () => {
+          expect(findSearchBox().props('value')).toBe(mockSearchTeam);
+        });
       });
 
       describe('when group search finishes loading', () => {