chore(ui-scripts,ui-test-utils): move test utils

[balzss]

INSTUI-3875

test plan:

• pick a random component that uses generateA11yTests in its tests
• comment out everything else in that test file (besides the generateA11yTests part) and run that test with npm run test -- --path packages/ui-component-name (with the actual path to that component)
• note down how many tests were run (should be around 1-4)
• next to that components __tests__ folder create a __new-tests__ folder
• create a test file named ComponentName.test.tsx (replace ComponentName with the actual name of the component)
• add the following code to that test:

import { render } from '@testing-library/react'

import { runAxeCheck } from '@instructure/ui-axe-check'
import { ComponentName } from '../index'
import ComponentNameExamples from '../__examples__/ComponentName.examples'
// eslint-disable-next-line no-restricted-imports
import { generateA11yTests } from '@instructure/ui-scripts/lib/test/generateA11yTests'

describe('<Breadcrumb />', () => {
  const generatedComponents = generateA11yTests(
    ComponentName,
    ComponentNameExamples
  )
  for (const component of generatedComponents) {
    it(component.description, async () => {
      const { container } = render(component.content)
      const axeCheck = await runAxeCheck(container)
      expect(axeCheck).toBe(true)
    })
  }
})

• run the new test with npm run test:new -- packages/ui-component-name
• the number of tests in the new test should match the number from the old tests

[github-actions]

Preview URL: https://1308--preview-instui.netlify.app