fix(webpack): enable legacy decorators and metadata in base config for compatibility (#30605)

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## Current Behavior
<!-- This is the behavior we have today -->
This PR fixes a runtime error in our NestJS application:

```
TypeError: Cannot read properties of undefined (reading 'get')
```
The root cause was that services were not being injected correctly due
to missing metadata reflection, which NestJS relies on for its
dependency injection system to resolve services.

## Expected Behavior
<!-- This is the behavior we should expect with the changes in this PR
-->
We now fully support NestJS's DI system by adding:

```ts
transform: {
  legacyDecorator: true,
  decoratorMetadata: true,
}
```
This restores proper behavior, and services are injected as expected.

## Related Issue(s)
<!-- Please link the issue being fixed so it gets closed when this is
merged. -->

Fixes #29136

packages/rspack/src/plugins/utils/apply-base-config.ts

@@ -424,6 +424,8 @@ function applyNxDependentConfig(
               tsx: true,
             },
             transform: {
+              legacyDecorator: true,
+              decoratorMetadata: true,
               react: {
                 runtime: 'automatic',
                 pragma: 'React.createElement',

packages/webpack/src/plugins/nx-webpack-plugin/lib/compiler-loaders.ts

@@ -20,6 +20,8 @@ export function createLoaderFromCompiler(
               tsx: true,
             },
             transform: {
+              legacyDecorator: true,
+              decoratorMetadata: true,
               react: {
                 runtime: 'automatic',
               },