Explore using Webpack DLLs

[tylersmalley]

In an effort to decrease the builds times and OOM's when developing, especially with multiple plugins we are going to explore using Webpacks DllPlugin and DllReferencePlugin.

https://webpack.js.org/plugins/dll-plugin/

[epixa]

I think we wanted to do webpack dlls for more than just development, unless that plan changed in discussions I wasn't a part of.

[w33ble]

I think we wanted to do webpack dlls for more than just development, unless that plan changed in discussions I wasn't a part of.

Absolutely. The development experience is the lowest priority here. A bad development experience is a developer problem, the inability to install plugins is a business problem. The driver for this was concerns about not being able to install X-Pack, especially if you wanted to, or already did, installed other plugins.

[tylersmalley]

Closing in favor of #20749