chore: test infra for transformations

[ematipico]

Summary

I moved all the shared functions across the analyzers inside a rome_test_utils crate.

The test infra of the transformer is a bit different from the analyzer:

• inside the transformations, we don't have about trivia, so all code is one lined;
• in the test infra, the code that is dumped in the snapshot is formatted;

We could evaluate to format of the emitted code once we expose the feature in the userland.

Test Plan

Fixed the enum transformation in some cases, but still cases need to be handled, and I plan to do so in another PR.

[netlify]

✅ Deploy Preview for docs-rometools ready!

Name	Link
🔨 Latest commit	de0bcb4
🔍 Latest deploy log	https://app.netlify.com/sites/docs-rometools/deploys/64bd084ed54d94000805267f
😎 Deploy Preview	https://deploy-preview-4719--docs-rometools.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[github-actions]

Parser conformance results on ubuntu-latest

js/262

Test result	main count	This PR count	Difference
Total	48863	48863	0
Passed	47810	47810	0
Failed	1053	1053	0
Panics	0	0	0
Coverage	97.84%	97.84%	0.00%

jsx/babel

Test result	main count	This PR count	Difference
Total	40	40	0
Passed	37	37	0
Failed	3	3	0
Panics	0	0	0
Coverage	92.50%	92.50%	0.00%

symbols/microsoft

Test result	main count	This PR count	Difference
Total	6212	6212	0
Passed	1764	1764	0
Failed	4448	4448	0
Panics	0	0	0
Coverage	28.40%	28.40%	0.00%

ts/babel

Test result	main count	This PR count	Difference
Total	639	639	0
Passed	573	573	0
Failed	66	66	0
Panics	0	0	0
Coverage	89.67%	89.67%	0.00%

ts/microsoft

Test result	main count	This PR count	Difference
Total	17224	17224	0
Passed	13121	13121	0
Failed	4103	4103	0
Panics	0	0	0
Coverage	76.18%	76.18%	0.00%

[Conaclos]

Looks good to me!