chore(project): update storybook to 6.4 (#10290)

* chore(project): update storybook to 6.4

* docs(carbon-react): update plugins for storybook

* docs(carbon-react): add support for webpack 5

* docs(react): update to webpack5

* chore(react): update mini-css-extract-plugin for webpack5

* chore(project): update dart sass convert

* Update packages/carbon-react/.storybook/theme.js

Co-authored-by: Abbey Hart <abbeyhrt@gmail.com>

* chore: check-in work

* chore: check-in work

* chore(cypress): revert changes

* chore(project): sync offline mirror and run format

* chore(components): update to work with latest babel changes

* test: update snapshots

* chore(react): revert changes to e2e test file

Co-authored-by: Abbey Hart <abbeyhrt@gmail.com>

Author: joshblack