refactor: BlockList uses Hooks (#50293)

* refactor: BlockList EmptyList uses Hooks

Adopt modern React paradigms prior to refactoring the components
composition. Completed to more closely mirror other code in the code
base.

* refactor: BlockList uses Hooks

Adopt modern React paradigms prior to refactoring the components
composition. Completed to more closely mirror other code in the code
base.

* refactor: BlockList higher-order components use Hooks

Adopt modern React paradigms prior to refactoring the components
composition. Completed to more closely mirror other code in the code
base.

Additionally, this removes the `withPreferredColorScheme` higher-order
component as it appeared unused.

* fix: BlockList footer interactivity

`VirtualList` expects a React Component (e.g. `SomeComponent`), or a
React element (e.g. `<SomeComponent` />) passed to the
`ListFooterComponent` prop. Passing a function instead resulted in the
block inserter never opening when tapping the block appender button
within the footer; this appeared to be due to excessive re-renders
resetting the `isOpen` state for the inserter.

* fix: Rename Footer addBlockToEndOfPost callback prop

The typo led to an undefined callback function.

* fix: Reinstate missing prop used within store selector

This prop was originally accessed via the `withSelect` higher-order
component. When converting to Hooks, passing this prop was overlooked.

* fix: Scope timer run by `waitForStoreResolvers`

Running all timers could create testing failures in scenarios wheres
where inner blocks were inserted, e.g. Social Icons. It is not known
why, but scoping from "all" to "pending" timers resolved the following
errors, without breaking any existing tests.

Unknown origin:

```
Warning: You seem to have overlapping act() calls, this is not supported. Be sure to await previous act() calls before making a new one.
```

Originating from `waitForStoreResolvers`:

```
Ran 100000 timers, and there are still more! Assuming we've hit an infinite recursion and bailing out...
```

Originating from `packages/block-editor/src/components/block-list/test/index.native.js`:

```
thrown: "Exceeded timeout of 5000 ms for a test.
```

* test: BlockList renders footer appender

* typo: Add code comment

Added to align with sibling tests.

* test: Expand empty BlockList appender tests

packages/block-editor/src/components/block-list/block-list-item-cell.native.js

@@ -7,14 +7,23 @@ import { View } from 'react-native';
  * WordPress dependencies
  */
 import { useEffect, useCallback } from '@wordpress/element';
+import { useSelect } from '@wordpress/data';
 
 /**
  * Internal dependencies
  */
 import { useBlockListContext } from './block-list-context';
+import { store as blockEditorStore } from '../../store';
 
-function BlockListItemCell( { children, clientId, rootClientId, onLayout } ) {
+function BlockListItemCell( { children, item: clientId, onLayout } ) {
 	const { blocksLayouts, updateBlocksLayouts } = useBlockListContext();
+	const { rootClientId } = useSelect(
+		( select ) => {
+			const { getBlockRootClientId } = select( blockEditorStore );
+			return { rootClientId: getBlockRootClientId( clientId ) };
+		},
+		[ clientId ]
+	);
 
 	useEffect( () => {
 		return () => {