chore(core): remove old scripts (#28465)

Issue number: N/A

---------

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issue. -->

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## What is the current behavior?
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The "prerelease" script hasn't been used since we switched off our
custom release scripts.

The "test.spec.debug" script doesn't do anything special now because the
`--node-arg` argument has been removed:

```
liamdebeasi@MacBook-Pro core % npx --node-arg=\"--inspect-brk\" stencil test --spec
npx: the --node-arg argument has been removed.
See `npm help exec` for more information
```

## What is the new behavior?
<!-- Please describe the behavior or changes that are being added by
this PR. -->

- Removed the "prerelease" and "test.spec.debug" scripts from "core"

## Does this introduce a breaking change?

- [ ] Yes
- [x] No

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and migration path for existing applications below. -->


## Other information

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screenshots of how the component looks before and after the change. -->

Author: liamdebeasi

core/package.json

@@ -86,13 +86,11 @@
     "lint.sass.fix": "npm run lint.sass -- --fix",
     "lint.ts": "npm run eslint",
     "lint.ts.fix": "npm run eslint -- --fix",
-    "prerelease": "npm run validate && np prerelease --yolo --any-branch --tag next",
     "prerender.e2e": "node scripts/testing/prerender.js",
     "prettier": "prettier \"./src/**/*.{html,ts,tsx,js,jsx}\"",
     "start": "npm run build.css && stencil build --dev --watch --serve",
     "test": "npm run test.spec && npm run test.e2e",
     "test.spec": "stencil test --spec --max-workers=2",
-    "test.spec.debug": "npx --node-arg=\"--inspect-brk\" stencil test --spec",
     "test.e2e": "npx playwright test",
     "test.e2e.update-snapshots": "npm run test.e2e -- --update-snapshots",
     "test.watch": "jest --watch --no-cache",