fix(core): consistently use ng:/// for sourcemap URLs (#29826)

Currently, in jit mode, `ngInjectableDef`, `ngDirectiveDef`, `ngPipeDef` and `ngModuleDef` use `ng://`,
which display them in the top domain in Chrome Dev Tools, whereas `ngComponentDef` uses `ng:///` which display components in a separate domain.

You can currently see:

```
AppModule
UserService
ng://
|_ AppComponent
   |_ template.html
|_ AppComponent.js
...
```

This commits replaces all `ng://` with `ng:///` to display every Angular entity in the `ng://` domain.

```
ng://
|_ AppModule
|_ UserService
|_ AppComponent
...
```

PR Close #29826

packages/core/src/di/jit/injectable.ts

@@ -71,7 +71,7 @@ export function compileInjectable(type: Type<any>, srcMeta?: Injectable): void {
           throw new Error(`Unreachable state.`);
         }
         def = getCompilerFacade().compileInjectable(
-            angularCoreDiEnv, `ng://${type.name}/ngInjectableDef.js`, compilerMeta);
+            angularCoreDiEnv, `ng:///${type.name}/ngInjectableDef.js`, compilerMeta);
       }
       return def;
     },