Support JSDOM when collecting code coverage

[SimenB]

From #8596. I've sent a PR to jsdom here: jsdom/jsdom#2731. Once that's merged and released, it should be a matter of updating jest-environment-jsdom on our side to use it.

[SimenB]

https://www.npmjs.com/package/jest-environment-jsdom-sixteen exists now, which works

[SimenB]

Need to update the docs to not link to this issue

[github-actions]

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