Transformation of static blocks breaks existing code

### Command

build

### Is this a regression?

- [x] Yes, this behavior used to work in the previous version

### The previous version in which this bug was not present was

_No response_

### Description

It appears that when Angular compiles using a recent version of Babel's [plugin-transform-class-static-block](https://babeljs.io/docs/babel-plugin-transform-class-static-block), with the Webpack builder, the output is transformed in such a way it breaks existing code.

Angular code compiled and bundled with `@babel/plugin-transform-class-static-block@7.27.1`:
```ts
let CodeEditorWidget = class CodeEditorWidget extends _base_common_lifecycle_js__WEBPACK_IMPORTED_MODULE_5__.Disposable {
static #_ = CodeEditorWidget_1 = this;
static #_2 = this.dropIntoEditorDecorationOptions = _common_model_textModel_js__WEBPACK_IMPORTED_MODULE_27__.ModelDecorationOptions.register({
description: 'workbench-dnd-target',
className: 'dnd-target'
}); //#endregion
get isSimpleWidget() {
return this._configuration.isSimpleWidget;
}
get contextMenuId() {
return this._configuration.contextMenuId;
}
constructor(domElement, _options, codeEditorWidgetOptions, instantiationService, codeEditorService, commandService, contextKeyService, themeService, notificationService, accessibilityService, languageConfigurationService, languageFeaturesService) {
var _this;
super();
_this = this;

// Omitted for brevity
};
```

Angular code compiled and bundled with `@babel/plugin-transform-class-static-block@7.28.3`:
```ts
let CodeEditorWidget = (class CodeEditorWidget extends _base_common_lifecycle_js__WEBPACK_IMPORTED_MODULE_5__.Disposable {
//#endregion
get isSimpleWidget() {
return this._configuration.isSimpleWidget;
}
get contextMenuId() {
return this._configuration.contextMenuId;
}
constructor(domElement, _options, codeEditorWidgetOptions, instantiationService, codeEditorService, commandService, contextKeyService, themeService, notificationService, accessibilityService, languageConfigurationService, languageFeaturesService) {
var _this = this;
super();

// Omitted for brevity

static #_ = _staticBlock = () => (CodeEditorWidget_1 = this, this.dropIntoEditorDecorationOptions = _common_model_textModel_js__WEBPACK_IMPORTED_MODULE_27__.ModelDecorationOptions.register({
description: 'workbench-dnd-target',
className: 'dnd-target'
}), this);
}, _staticBlock());
```

The workaround, which you will also see explained in the attached reproducer, is to override the version of the Babel's plugin to 7.27.1.

I don't understand why, and under which circumstance, that plugin is injected into the compilation process.

### Minimal Reproduction

Steps to reproduce can be found on the reproducer's repository: https://github.com/lppedd/angular-monaco-repro

### Exception or Error

```text
ERROR ReferenceError: Must call super constructor in derived class before accessing 'this' or returning from derived constructor
at new CodeEditorWidget (codeEditorWidget.js:69:252)
at new StandaloneCodeEditor (standaloneCodeEditor.js:69:9)
at new StandaloneEditor (standaloneCodeEditor.js:188:9)
at InstantiationService._createInstance (instantiationService.js:130:24)
at InstantiationService.createInstance (instantiationService.js:101:27)
at Object.create (standaloneEditor.js:43:33)
at App.ngAfterViewInit (app.ts:16:33)
at callHookInternal (debug_node.mjs:860:14)
at callHook (debug_node.mjs:887:13)
at callHooks (debug_node.mjs:841:17)
```

### Your Environment

```text
Angular CLI: 20.3.8
Node: 22.18.0
Package Manager: npm 11.6.2
OS: win32 x64

Angular: 20.3.9
... common, compiler, compiler-cli, core, forms
... platform-browser, router

Package Version
---------------------------------------
@angular-devkit/architect 0.2003.8
@angular-devkit/build-angular 20.3.8
@angular-devkit/core 20.3.8
@angular-devkit/schematics 20.3.8
@angular/build 20.3.8
@angular/cli 20.3.8
@schematics/angular 20.3.8
rxjs 7.8.2
typescript 5.9.3
zone.js 0.15.1
```

### Anything else relevant?

_No response_

Commencez par le dépôt angular-monaco-repro lié et comparez les builds en utilisant @babel/plugin-transform-class-static-block 7.27.1 et 7.28.3 via le Webpack builder. Suivez l’endroit où le plugin entre dans le build Angular CLI, puis vérifiez que le CodeEditorWidget généré ne lève plus l’erreur de super-constructor signalée avec la version actuelle du plugin.

Rédigé par le modèle d'indexation à partir du texte de l'issue.