feat(ivy): use i18n locale data to determine the plural form of ICU expressions (#29249)

Plural ICU expressions depend on the locale (different languages have different plural forms). Until now the locale was hard coded as `en-US`.
For compatibility reasons, if you use ivy with AOT and bootstrap your app with `bootstrapModule` then the `LOCALE_ID` token will be set automatically for ivy, which is then used to get the correct plural form.
If you use JIT, you need to define the `LOCALE_ID` provider on the module that you bootstrap.
For `TestBed` you can use either `configureTestingModule` or `overrideProvider` to define that provider.
If you don't use the compat mode and start your app with `renderComponent` you need to call `ɵsetLocaleId` manually to define the `LOCALE_ID` before bootstrap. We expect this to change once we start adding the new i18n APIs, so don't rely on this function (there's a reason why it's a private export).
PR Close #29249

packages/compiler-cli/src/ngtsc/program.ts

@@ -501,7 +501,8 @@ export class NgtscProgram implements api.Program {
           this.options.strictInjectionParameters || false),
       new NgModuleDecoratorHandler(
           this.reflector, evaluator, metaRegistry, scopeRegistry, referencesRegistry, this.isCore,
-          this.routeAnalyzer, this.refEmitter, this.defaultImportTracker),
+          this.routeAnalyzer, this.refEmitter, this.defaultImportTracker,
+          this.options.i18nInLocale),
       new PipeDecoratorHandler(
           this.reflector, evaluator, metaRegistry, this.defaultImportTracker, this.isCore),
     ];