Removes ee differences for container.vue

Creates a mixin to include the ee only properties

app/assets/javascripts/environments/components/container.vue

 <script>
 import { GlLoadingIcon } from '@gitlab/ui';
-import tablePagination from '../../vue_shared/components/table_pagination.vue';
-import environmentTable from '../components/environments_table.vue';
+import TablePagination from '~/vue_shared/components/table_pagination.vue';
+import containerMixin from 'ee_else_ce/environments/mixins/container_mixin';
+import EnvironmentTable from '../components/environments_table.vue';
 
 export default {
   components: {
-    environmentTable,
-    tablePagination,
+    EnvironmentTable,
+    TablePagination,
     GlLoadingIcon,
   },
+  mixins: [containerMixin],
   props: {
     isLoading: {
       type: Boolean,
@@ -26,28 +28,6 @@ export default {
       type: Boolean,
       required: true,
     },
-    // ee-only start
-    canaryDeploymentFeatureId: {
-      type: String,
-      required: true,
-    },
-    showCanaryDeploymentCallout: {
-      type: Boolean,
-      required: true,
-    },
-    userCalloutsPath: {
-      type: String,
-      required: true,
-    },
-    lockPromotionSvgPath: {
-      type: String,
-      required: true,
-    },
-    helpCanaryDeploymentsPath: {
-      type: String,
-      required: true,
-    },
-    // ee-only end
   },
   methods: {
     onChangePage(page) {

app/assets/javascripts/environments/mixins/container_mixin.js

+export default {
+  props: {
+    canaryDeploymentFeatureId: {
+      type: String,
+      required: false,
+      default: null,
+    },
+    showCanaryDeploymentCallout: {
+      type: Boolean,
+      required: false,
+      default: false,
+    },
+    userCalloutsPath: {
+      type: String,
+      required: false,
+      default: null,
+    },
+    lockPromotionSvgPath: {
+      type: String,
+      required: false,
+      default: null,
+    },
+    helpCanaryDeploymentsPath: {
+      type: String,
+      required: false,
+      default: null,
+    },
+  },
+};

ee/app/assets/javascripts/environments/mixins/container_mixin.js

+export default {
+  props: {
+    canaryDeploymentFeatureId: {
+      type: String,
+      required: true,
+    },
+    showCanaryDeploymentCallout: {
+      type: Boolean,
+      required: true,
+    },
+    userCalloutsPath: {
+      type: String,
+      required: true,
+    },
+    lockPromotionSvgPath: {
+      type: String,
+      required: true,
+    },
+    helpCanaryDeploymentsPath: {
+      type: String,
+      required: true,
+    },
+  },
+};