Remove computed props checks from pipelines specs

Pipelines specs refactor to improve:
- Removing internal checks such as computed propos
- Triggering events instead of invoking methods
- Replace find() calls to use finder methods

app/assets/javascripts/pipelines/components/pipelines_list/empty_state.vue

@@ -48,6 +48,7 @@ export default {
               variant="info"
               category="primary"
               class="js-get-started-pipelines"
+              data-testid="get-started-pipelines"
             >
               {{ s__('Pipelines|Get started with Pipelines') }}
             </gl-button>

app/assets/javascripts/pipelines/components/pipelines_list/nav_controls.vue

@@ -46,6 +46,7 @@ export default {
       variant="success"
       category="primary"
       class="js-run-pipeline"
+      data-testid="run-pipeline-button"
     >
       {{ s__('Pipelines|Run Pipeline') }}
     </gl-button>
@@ -54,12 +55,13 @@ export default {
       v-if="resetCachePath"
       :loading="isResetCacheButtonLoading"
       class="js-clear-cache"
+      data-testid="clear-cache-button"
       @click="onClickResetCache"
     >
       {{ s__('Pipelines|Clear Runner Caches') }}
     </gl-button>
 
-    <gl-button v-if="ciLintPath" :href="ciLintPath" class="js-ci-lint">
+    <gl-button v-if="ciLintPath" :href="ciLintPath" class="js-ci-lint" data-testid="ci-lint-button">
       {{ s__('Pipelines|CI Lint') }}
     </gl-button>
   </div>

app/assets/javascripts/vue_shared/components/navigation_tabs.vue

@@ -58,7 +58,12 @@ export default {
         active: tab.isActive,
       }"
     >
-      <a :class="`js-${scope}-tab-${tab.scope}`" role="button" @click="onTabClick(tab)">
+      <a
+        :class="`js-${scope}-tab-${tab.scope}`"
+        :data-testid="`${scope}-tab-${tab.scope}`"
+        role="button"
+        @click="onTabClick(tab)"
+      >
         {{ tab.name }}
 
         <span v-if="shouldRenderBadge(tab.count)" class="badge badge-pill"> {{ tab.count }} </span>