Move EE differences dor `app/assets/javascripts/pipelines/components/graph/stage_column_component.vue`

The file `` has differences between CE and EE.

Diferences

diff --git a/home/yorickpeterse/Projects/gitlab/gdk-ce/gitlab/app/assets/javascripts/pipelines/components/graph/stage_column_component.vue b/home/yorickpeterse/Projects/gitlab/gdk-ee/gitlab/app/assets/javascripts/pipelines/components/graph/stage_column_component.vue
index 09a50d25020..556d26b33c9 100644
--- a/home/yorickpeterse/Projects/gitlab/gdk-ce/gitlab/app/assets/javascripts/pipelines/components/graph/stage_column_component.vue
+++ b/home/yorickpeterse/Projects/gitlab/gdk-ee/gitlab/app/assets/javascripts/pipelines/components/graph/stage_column_component.vue
@@ -27,13 +27,18 @@ export default {
       required: false,
       default: '',
     },
+    hasTriggeredBy: {
+      type: Boolean,
+      required: false,
+      default: false,
+    },
   },
   methods: {
     groupId(group) {
       return `ci-badge-${_.escape(group.name)}`;
     },
     buildConnnectorClass(index) {
-      return index === 0 && !this.isFirstColumn ? 'left-connector' : '';
+      return index === 0 && (!this.isFirstColumn || this.hasTriggeredBy) ? 'left-connector' : '';
     },
     pipelineActionRequestComplete() {
       this.$emit('refreshPipelineGraph');

What needs to be done

1. Create a mixin