Rename popover trigger id computed value

- `iconId` => `popoverTriggerId`
- it is more readable

ee/app/assets/javascripts/approvals/components/approval_check_popover.vue

@@ -30,7 +30,7 @@ export default {
     },
   },
   computed: {
-    iconId() {
+    popoverTriggerId() {
       return `reportInfo-${this.title}`;
     },
   },
@@ -40,14 +40,14 @@ export default {
 <template>
   <span class="vertical-align-middle text-muted js-help ml-2">
     <gl-icon
-      :id="iconId"
+      :id="popoverTriggerId"
       name="question"
       class="author-link suggestion-help-hover"
       :aria-label="__('help')"
       :size="14"
       data-testid="icon2"
     />
-    <gl-popover :target="iconId" placement="top" :title="title">
+    <gl-popover :target="popoverTriggerId" placement="top" :title="title">
       <div class="mb-2">{{ text }}</div>
       <gl-link v-if="documentationLink" target="_blank" :href="documentationLink">
         <span class="vertical-align-middle">{{ documentationText }}</span>