Specs: Shallow mount where possible

* Adds shallowMount factory
* Uses it in places where possible

ee/spec/frontend/security_dashboard/components/vulnerability_action_buttons_spec.js

-import { createWrapper, mount } from '@vue/test-utils';
+import { createWrapper, mount, shallowMount } from '@vue/test-utils';
 import { GlButton } from '@gitlab/ui';
 import { extendedWrapper } from 'helpers/vue_test_utils_helper';
 import VulnerabilityActionButtons, {
@@ -14,13 +14,17 @@ describe('Security Dashboard Action Buttons', () => {
   let store;
   let wrapper;
 
-  const createComponent = ({ ...options }) =>
+  const wrapperFactory = (mountFn) => ({ ...options }) =>
     extendedWrapper(
-      mount(VulnerabilityActionButtons, {
+      mountFn(VulnerabilityActionButtons, {
         ...options,
         store,
       }),
     );
+
+  const createShallowComponent = wrapperFactory(shallowMount);
+  const createFullComponent = wrapperFactory(mount);
+
   const findAllButtons = () => wrapper.findAllComponents(GlButton);
   const findMoreInfoButton = () => wrapper.findByTestId('more-info');
   const findCreateIssueButton = () => wrapper.findByTestId('create-issue');
@@ -38,7 +42,7 @@ describe('Security Dashboard Action Buttons', () => {
 
   describe('with a fresh vulnerability', () => {
     beforeEach(() => {
-      wrapper = createComponent({
+      wrapper = createFullComponent({
         propsData: {
           vulnerability: mockDataVulnerabilities[0],
           canCreateIssue: true,
@@ -90,7 +94,7 @@ describe('Security Dashboard Action Buttons', () => {
 
       describe('with Jira issues for vulnerabilities enabled', () => {
         beforeEach(() => {
-          wrapper = createComponent({
+          wrapper = createFullComponent({
             propsData: {
               vulnerability: mockDataVulnerabilities[8],
               canCreateIssue: true,
@@ -140,7 +144,7 @@ describe('Security Dashboard Action Buttons', () => {
 
   describe('with a vulnerability that has an issue', () => {
     beforeEach(() => {
-      wrapper = createComponent({
+      wrapper = createShallowComponent({
         propsData: {
           vulnerability: mockDataVulnerabilities[3],
         },
@@ -158,7 +162,7 @@ describe('Security Dashboard Action Buttons', () => {
 
   describe('with a vulnerability that has been dismissed', () => {
     beforeEach(() => {
-      wrapper = createComponent({
+      wrapper = createShallowComponent({
         propsData: {
           vulnerability: mockDataVulnerabilities[2],
           canDismissVulnerability: true,