Reduce storybook build time in CI to < 2 mins (#2093)

* debug-ci-gatsby-build-speed

* add storybook as well

* remove storybook-addon-html

* test: use storybook-addon-html, but disable babel-plugin-open-source

* test: remove Pagination component

* make room for storybook

* try storybook-addon-turbo-build

* bring back Pagination

* test: optimizationLevel: 2

* debug: give more info during build!

* rollback debuging changes

* move addon-html back to production only

Co-authored-by: Cole Bemis <colebemis@github.com>

.storybook/main.js

@@ -5,6 +5,7 @@ module.exports = {
     '@storybook/addon-links',
     {name: '@storybook/addon-essentials', options: {backgrounds: false}},
     'storybook-addon-performance/register',
+    {name: 'storybook-addon-turbo-build', options: {optimizationLevel: 2}},
     ...(process.env.NODE_ENV === 'production' && process.env.GITHUB_JOB !== 'chromatic'
       ? ['@whitespace/storybook-addon-html']
       : [])