WP5 - Update IgnorePlugin signature

Created by: raix

Support Webpack 4+5 IgnorePlugin signature

Reference:

• https://webpack.js.org/plugins/ignore-plugin/#example-of-ignoring-moment-locales

Part of making way for Webpack 5 #9994 (closed)

yarn docker:e2e --test-suite simple not yet tested but done manual QA on development and build*