docs: tView.preOrderHooks and tView.preOrderCheckHooks docs update (#…

…39497)

This commit updates the docs for the `tView.preOrderHooks` and `tView.preOrderCheckHooks` TView
fields. Current docs are not up-to-date as it was pointed out in #39439.

Closes #39439.

PR Close #39497

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

@@ -597,16 +597,19 @@ export interface TView {
    * Array of ngOnInit, ngOnChanges and ngDoCheck hooks that should be executed for this view in
    * creation mode.
    *
-   * Even indices: Directive index
-   * Odd indices: Hook function
+   * This array has a flat structure and contains TNode indices, directive indices (where an
+   * instance can be found in `LView`) and hook functions. TNode index is followed by the directive
+   * index and a hook function. If there are multiple hooks for a given TNode, the TNode index is
+   * not repeated and the next lifecycle hook information is stored right after the previous hook
+   * function. This is done so that at runtime the system can efficiently iterate over all of the
+   * functions to invoke without having to make any decisions/lookups.
    */
   preOrderHooks: HookData|null;
 
   /**
    * Array of ngOnChanges and ngDoCheck hooks that should be executed for this view in update mode.
    *
-   * Even indices: Directive index
-   * Odd indices: Hook function
+   * This array has the same structure as the `preOrderHooks` one.
    */
   preOrderCheckHooks: HookData|null;
 
@@ -697,8 +700,7 @@ export interface TView {
 
   /**
    * An array of indices pointing to directives with content queries alongside with the
-   * corresponding
-   * query index. Each entry in this array is a tuple of:
+   * corresponding query index. Each entry in this array is a tuple of:
    * - index of the first content query index declared by a given directive;
    * - index of a directive.
    *