Upgrade to storybook v8.0.5 (#1318)

## What are you changing?

- upgrade storybook to v8.0.5
- remove [deprecated
`@storybook/addons`](https://www.npmjs.com/package/@storybook/addons)

## Why?

I naively thought an upgrade might fix the [accessibility
scan](#1121 (comment))
issue. Alas it did not. However I took the opportunity to remove a
deprecated package whilst I was here, which was causing version matching
issues.

libs/@guardian/source-react-components-development-kitchen/.storybook/manager.ts

@@ -1,4 +1,4 @@
-import { addons } from '@storybook/addons';
+import { addons } from '@storybook/manager-api';
 import { theme } from './theme';
 
 addons.setConfig({

libs/@guardian/source-react-components/.storybook/manager.ts

@@ -1,4 +1,4 @@
-import { addons } from '@storybook/addons';
+import { addons } from '@storybook/manager-api';
 import { theme } from './theme';
 
 addons.setConfig({

package.json

@@ -24,15 +24,15 @@
 		"@nx/eslint-plugin": "18.0.7",
 		"@nx/jest": "18.0.7",
 		"@nx/workspace": "18.0.7",
-		"@storybook/addon-a11y": "8.0.0",
-		"@storybook/addon-docs": "8.0.0",
-		"@storybook/addon-essentials": "8.0.0",
-		"@storybook/addon-links": "8.0.0",
-		"@storybook/addon-viewport": "8.0.0",
-		"@storybook/addons": "7.6.5",
-		"@storybook/react": "8.0.0",
-		"@storybook/react-webpack5": "8.0.0",
-		"@storybook/theming": "8.0.0",
+		"@storybook/addon-a11y": "8.0.5",
+		"@storybook/addon-docs": "8.0.5",
+		"@storybook/addon-essentials": "8.0.5",
+		"@storybook/addon-links": "8.0.5",
+		"@storybook/addon-viewport": "8.0.5",
+		"@storybook/manager-api": "^8.0.5",
+		"@storybook/react": "8.0.5",
+		"@storybook/react-webpack5": "8.0.5",
+		"@storybook/theming": "8.0.5",
 		"@swc-node/register": "1.9.0",
 		"@swc/core": "1.4.0",
 		"@swc/helpers": "^0.5.2",
@@ -59,7 +59,7 @@
 		"react-dom": "18.2.0",
 		"require-from-string": "2.0.2",
 		"sort-package-json": "2.8.0",
-		"storybook": "8.0.0",
+		"storybook": "8.0.5",
 		"ts-jest": "29.1.1",
 		"tsconfig-paths-webpack-plugin": "4.1.0",
 		"typescript": "5.3.3",