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/core/src/render3/component.ts

@@ -61,7 +61,7 @@ export interface CreateComponentOptions {
    * Typically, the features in this list are features that cannot be added to the
    * other features list in the component definition because they rely on other factors.
    *
-   * Example: `RootLifecycleHooks` is a function that adds lifecycle hook capabilities
+   * Example: `LifecycleHooksFeature` is a function that adds lifecycle hook capabilities
    * to root components in a tree-shakable way. It cannot be added to the component
    * features list because there's no way of knowing when the component will be used as
    * a root component.