Convert tests from Jest to Vitest or node-test

[bradenmacdonald]

Node's built-in test runner which has been stable since Node 20, has most of the same features as Jest, runs tests faster, supports ESM, and doesn't take up any space nor add any dependencies, unlike Jest which is quite bloated - 512 dependencies and 68 MB disk just for jest@30.0.5.

This PR nodejs/nodejs.org#7623 is a good example of what such a conversion looks like and shows things like how to setup jsdom with node:test.

This PR shows how to do it in one of our repos: openedx/paragon#4043

Discussion: https://openedx.slack.com/archives/C04BM6YC7A6/p1756171002718889

Steps

• Wait for discussion on refactor: run tests with vitest paragon#4043 to see if we'll go with Vitest or node:test
• Update this repo so that some tests can run using Jest and others using a new test runner
• Convert "chunks" of tests from Jest to Vitest/node-test, e.g. pick a folder and convert all the tests in that folder. Repeat.
• Remove Jest
• Share learnings with other MFEs

[MVGRAO]

I am not able join in Discussion Slaack channel , Can you check once right @bradenmacdonald

[bradenmacdonald]

@MVGRAO What would you like me to check? The discussion on the Slack channel is not necessary to work on this ticket and is just a couple people saying it looks like a good idea. The required information is all in the issue above.

[MVGRAO]

@bradenmacdonald Ok , Can I proceed to resolve the issue

[MVGRAO]

@bradenmacdonald Can , You check , I have raised the PR