chore(build): uplift webpack-related packages to v5

[hainenber]

chore(build): uplift webpack-related packages to webpack5-supported version

SUMMARY

Uplift the webpack-related packages to webpack5-supported version for currency and fix any associated vulnerabilities.
There's a small config refactor in superset-frontend's webpack.config.js made by following webpack-dev-server's migration guide

I run npm run dev, npm run build and npm run dev-server and all things look good.

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

N/A

TESTING INSTRUCTIONS

Run npm run dev, npm run build-dev and npm run dev-server

ADDITIONAL INFORMATION

• Has associated issue:
• Required feature flags:
• Changes UI
• Includes DB Migration (follow approval process in SIP-59)
  • Migration is atomic, supports rollback & is backwards-compatible
  • Confirm DB migration upgrade and downgrade tested
  • Runtime estimates and downtime expectations provided
• Introduces new feature or API
• Removes existing feature or API

[kgabryje]

LGTM

[michael-s-molina]

@hainenber @kgabryje It looks like the correct way of implementing the desired behavior is to use the afterEmit compiler hook instead of a middleware.