feat: get rid of bundle analyzer on by default in prod

[regisb]

Every run of npm run build generates a report.html file that includes file size stats. It's useless in most cases. We suggest to remove it (along with the dependency) in all MFEs.

This shaves 14s (out of 174s) of the build on my laptop for the learning MFE build.

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[regisb]

This is ready for review.

[adamstankiewicz]

It's useless in most cases.

I personally refer to the generated report.html about production builds often in the MFEs I support to keep an eye on the application's bundle size, find opportunities for code splitting, see which node_modules packages are largest, etc., so I personally wouldn't necessarily say its "useless in most cases." Removing this for all MFEs does not help to encourage the good practice of keeping an eye on and improving bundle size.

That said, I could see the generation of the report perhaps being more an opt-in option when creating a build, e.g. fedx-scripts webpack --create-bundle-report or similar so it doesn't impact CI builds but could still be selectively used during local development.

[regisb]

The generation of report.html in production builds has the unfortunate side effect that it's also available on edx.org... See for instance: https://authn.edx.org/report.html

[bradenmacdonald]

+1 for keeping this functionality available (including for prod builds, which can be different than dev builds), as it's very useful - but I agree it shouldn't be on by default.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 0.00%. Comparing base (3c80898) to head (dfa591a).
Report is 1 commits behind head on master.

Additional details and impacted files

@@      Coverage Diff      @@
##   master   #646   +/-   ##
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