ci: enable ESM loader for Docusaurus

[merceyz]

What's the problem this PR addresses?

The Docusaurus e2e test started failing at 2022-01-26T20:01:17Z because it tries to import ESM but the ESM loader isn't enabled.

How did you fix it?

Enable the ESM loader

Checklist

• I have read the Contributing Guide.
• I have set the packages that need to be released for my changes to be effective.
• I will check that all automated PR checks pass before the PR gets reviewed.

[arcanis]

I think the comment here has been fixed in 17.4.0 (PR), correct? Perhaps we should just upgrade the Node version here?

berry/scripts/e2e-setup-ci.sh

Lines 31 to 38 in bd146cc

	# TODO: Remove when either of these issues are fixed
	# - https://github.com/nodejs/node/issues/39140
	# - https://github.com/nodejs/node/issues/37782
	# - https://github.com/facebook/jest/issues/12060
	# Due to a bug in `jest-worker` and/or Node.js adding a loader
	# causes our e2e tests to time out so require the tests that needs it
	# to explicitly enable it
	export YARN_PNP_ENABLE_ESM_LOADER=false

[merceyz]

Assuming you meant to link to nodejs/node#41221 then yes, it has been fixed in 17.4.0 but I don't want to upgrade the CI to that version due to the OpenSSL changes causing webpack@4 builds to not work. I'd rather wait for that PR to be backported.