fix(ivy): ensure host bindings and host styling works on a root component (#28664)

Prior to this fix if a root component was instantiated it create host
bindings, but never render them once update mode ran unless one or more
slot-allocated bindings were issued. Since styling in Ivy does not make
use of LView slots, the host bindings function never ran on the root
component.

This fix ensures that the `hostBindings` function does run for a root
component and also renders the schedlued styling instructions when
executed.

Jira Issue: FW-1062

PR Close #28664

packages/core/src/render3/interfaces/view.ts

@@ -292,6 +292,13 @@ export const enum InitPhaseState {
   InitPhaseCompleted = 0b11,
 }
 
+/**
+ * Set of instructions used to process host bindings efficiently.
+ *
+ * See VIEW_DATA.md for more information.
+ */
+export interface ExpandoInstructions extends Array<number|HostBindingsFunction<any>|null> {}
+
 /**
  * The static data for an LView (shared between all templates of a
  * given type).
@@ -401,7 +408,7 @@ export interface TView {
    *
    * See VIEW_DATA.md for more information.
    */
-  expandoInstructions: (number|HostBindingsFunction<any>|null)[]|null;
+  expandoInstructions: ExpandoInstructions|null;
 
   /**
    * Full registry of directives and components that may be found in this view.