chore: update system tests and prep for react18 harness removal/upstream merge for component testing

[AtofStryker]

• Closes N/A

Additional details

The goal of this PR is to get our system tests up to date with the latest technologies that we support. This means:

• moving more projects from webpack/webpack-dev-server from v4 to v5 and related loaders/dependencies
• updating typescript from v4 to v5 is most tests (except ts 4 explicit tests)
• updating react system tests from 16x/17x to 18x and using the cypress/react18 test harness as a precursor to #30590 (react17 system tests are removed here).
• trying to get closer alignment in our system tests package.json
• removing the webpack-preprocessor-awesome-typescript-loader tests as it isn't actively maintained and ts-loader is now the used loader by most
• removing the react-app-webpack-5-unconfigured app and replacing with react18-webpack-unconfigured as it is a lot smaller and easier to maintain (not the ejected create-react-app)
• issue-25951-next-app is removed as this is tested with next versions over 13 passively. We currently support 14+
• the module-api snapshots needed to be updated with updating snap-shot-it 2 major versions, so now the snapshots live in a single file

to make the system tests on webpack more deterministic, I changed the stat output to be errors only so we don't have a lot of drift when new modules or times exist in the snapshot

Steps to test

How has the user experience changed?

PR Tasks

• [x] Have tests been added/updated?
• [ ] Has a PR for user-facing changes been opened in cypress-documentation?
• [ ] Have API changes been updated in the type definitions?

[cypress[bot]]

cypress    Run #58413

Run Properties:   Passed #58413  •  cbdb33a5bb: chore: update system tests to use react 18 and install latest dependencies for a...

Project	cypress
Branch Review	chore/update-tests-prep-react-18-ct-update
Run status	Passed #58413
Run duration	17m 44s
Commit	cbdb33a5bb: chore: update system tests to use react 18 and install latest dependencies for a...
Committer	AtofStryker
View all properties for this run ↗︎

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Test results
Failures	0
Flaky	4
Pending	1326
Skipped	0
Passing	29318
View all changes introduced in this branch ↗︎

UI Coverage  45.79%
Untested elements	188
Tested elements	163

Accessibility  92.56%
Failed rules	3 critical   8 serious   2 moderate   2 minor
Failed elements	892