Move the init code to the relevant folder

Follow the same pattern we're using in the security dashboards
and move the init code to the appropriate folder

ee/app/assets/javascripts/pages/projects/security/vulnerabilities/show/index.js

-import Vue from 'vue';
-import MainApp from 'ee/vulnerabilities/components/vulnerability.vue';
-import { convertObjectPropsToCamelCase } from '~/lib/utils/common_utils';
+import initVulnerabilities from 'ee/vulnerabilities/vulnerabilities_init';
 
-(function createMainApp() {
-  const el = document.getElementById('js-vulnerability-main');
-  const vulnerability = convertObjectPropsToCamelCase(JSON.parse(el.dataset.vulnerability), {
-    deep: true,
-  });
-
-  return new Vue({
-    el,
-
-    provide: {
-      reportType: vulnerability.reportType,
-      createIssueUrl: vulnerability.createIssueUrl,
-      projectFingerprint: vulnerability.projectFingerprint,
-      vulnerabilityId: vulnerability.id,
-      issueTrackingHelpPath: vulnerability.issueTrackingHelpPath,
-      permissionsHelpPath: vulnerability.permissionsHelpPath,
-    },
-
-    render: h =>
-      h(MainApp, {
-        props: { vulnerability },
-      }),
-  });
-})();
+initVulnerabilities(document.getElementById('js-vulnerability-main'));

ee/app/assets/javascripts/vulnerabilities/vulnerabilities_init.js

+import Vue from 'vue';
+import App from 'ee/vulnerabilities/components/vulnerability.vue';
+import { convertObjectPropsToCamelCase } from '~/lib/utils/common_utils';
+
+export default el => {
+  const vulnerability = convertObjectPropsToCamelCase(JSON.parse(el.dataset.vulnerability), {
+    deep: true,
+  });
+
+  return new Vue({
+    el,
+
+    provide: {
+      reportType: vulnerability.reportType,
+      createIssueUrl: vulnerability.createIssueUrl,
+      projectFingerprint: vulnerability.projectFingerprint,
+      vulnerabilityId: vulnerability.id,
+      issueTrackingHelpPath: vulnerability.issueTrackingHelpPath,
+      permissionsHelpPath: vulnerability.permissionsHelpPath,
+    },
+
+    render: h =>
+      h(App, {
+        props: { vulnerability },
+      }),
+  });
+};