Angular v19 prerender uses the wrong package.json

### Which @angular/* package(s) are the source of the bug?

ssr

### Is this a regression?

No

### Description

when running an angular app that uses `AngularNodeAppEngine` from "@angular/ssr/node" and `outputMode` set to `server` it reads `imports` from `src/package.json` which is set to be used in dist

package.json
```
"imports": {
"#configs/*": "./browser/configs/*.js"
}
```
in the source code the configs folder is live in "src/configs" but copied at build time into "dist/browser/configs"
the same goes for many dynamic imports that assume the app runs inside the dist dir, i.e. the paths may be differ from the corresponding paths in the source code.

The prerender should run the same way as the original app runs i.e. from dist.

another thing, I cannot find an option to totally disable the prerendering as `prerender: false` now has no effect

### Please provide the environment you discovered this bug in (run `ng version`)

```
Angular CLI: 19.2.1
Node: 22.12.0
Package Manager: npm 10.9.0
OS: linux x64

Angular: 19.2.1
... animations, build, cli, common, compiler, compiler-cli, core
... forms, platform-browser, platform-browser-dynamic
... platform-server, router, service-worker, ssr

Package Version
------------------------------------------------------
@angular-devkit/architect 0.1902.1
@angular-devkit/core 19.2.1
@angular-devkit/schematics 19.2.1
@angular/cdk 19.2.2
@angular/material 19.2.2
@schematics/angular 19.2.1
rxjs 7.8.2
typescript 5.8.2
zone.js 0.15.0

```

### Anything else?

_No response_

angular.json

```
{
"$schema": "./node_modules/@angular/cli/lib/config/schema.json",
"version": 1,
"newProjectRoot": "projects",
"projects": {
"cms-ui": {
"projectType": "application",
"schematics": {
"@schematics/angular:component": {
"style": "scss"
}
},
"root": "",
"sourceRoot": "src",
"prefix": "app",
"architect": {
"build": {
"builder": "@angular/build:application",
"options": {
"outputPath": "dist",
"index": "src/index.html",
"browser": "src/main.ts",
"polyfills": ["zone.js"],
"tsConfig": "tsconfig.json",
"inlineStyleLanguage": "scss",
"assets": [
"src/favicon.ico",
"src/assets",
"src/manifest.webmanifest",
"src/scripts.mjs",
"src/configs"
],
"styles": ["src/styles.scss"],
"scripts": [],
"server": "src/main.server.ts",
"outputMode": "server",
"prerender": false,
"ssr": {
"entry": "src/server.ts"
},
"serviceWorker": "ngsw-config.json",
"define": {},
"namedChunks": true,
"externalDependencies": ["#configs/*"]
},
"configurations": {
"production": {
"budgets": [
{
"type": "initial",
"maximumWarning": "2m"
},
{
"type": "anyComponentStyle",
"maximumWarning": "2kb"
}
],
"outputHashing": "all"
},
"development": {
"optimization": false,
"extractLicenses": false,
"sourceMap": true
}
},
"defaultConfiguration": "production"
},
"serve": {
"builder": "@angular/build:dev-server",
"configurations": {
"production": {
"buildTarget": "cms-ui:build:production"
},
"development": {
"buildTarget": "cms-ui:build:development"
}
},
"defaultConfiguration": "development"
},
"extract-i18n": {
"builder": "@angular/build:extract-i18n",
"options": {
"buildTarget": "cms-ui:build"
}
},
"test": {
"builder": "@angular/build:karma",
"options": {
"polyfills": ["zone.js", "zone.js/testing"],
"tsConfig": "tsconfig.spec.json",
"inlineStyleLanguage": "scss",
"assets": [
"src/favicon.ico",
"src/assets",
"src/manifest.webmanifest",
"src/scripts.mjs",
"src/configs"
],
"styles": ["src/styles.scss"],
"scripts": []
}
}
}
}
},
"cli": {
"analytics": false
}
}
```

从 @angular/ssr/node 中的 AngularNodeAppEngine 入口点和报告中显示的 src/package.json 导入开始，然后跟踪 angular.json 如何通过 src/server.ts 调用服务器输出和 prerendering。验证解析是从 dist 而不是 src 进行的，并验证文档所述的 prerender: false 设置会阻止 prerendering。

由索引模型根据 Issue 内容生成。