[web] Add all CanvasKit variants and ICU4X to Flutter's bin/cache

https://github.com/flutter/flutter/blob/46c7fd14da027f71e2c300e392bd1976b56d30a4/packages/flutter_tools/lib/src/flutter_cache.dart#L209-L222

	// If the flutter_web_sdk folder doesn't already contain CanvasKit, then
	// download it from CIPD.
	// TODO(hterkelsen): This whole section can be removed when we are always building
	// CanvasKit as part of flutter_web_sdk. See https://github.com/flutter/flutter/issues/113073
	final File expectedCanvasKitFile = fileSystem.file(fileSystem.path.join(location.path, 'canvaskit', 'canvaskit.wasm'));
	if (!expectedCanvasKitFile.existsSync()) {
	final String canvasKitVersion = cache.getVersionFor('canvaskit')!;
	final String canvasKitUrl = '${cache.cipdBaseUrl}/flutter/web/canvaskit_bundle/+/$canvasKitVersion';
	return artifactUpdater.downloadZipArchive(
	'Downloading CanvasKit...',
	Uri.parse(canvasKitUrl),
	location,
	);
	}

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