Autotitle when not using storyStoreV7

[IanVS]

Currently, autotitle does not work without enabling storyStoreV7. We need to provide a global STORIES like the webpack builder does here: https://github.com/storybookjs/storybook/blob/e0c0a1429dc123219dfd74c8c4a1c6bfc9660f74/lib/builder-webpack4/src/preview/iframe-webpack.config.ts#L191-L194, so that it can be used here: https://github.com/storybookjs/storybook/blob/e0c0a1429dc123219dfd74c8c4a1c6bfc9660f74/lib/client-api/src/StoryStoreFacade.ts#L156-L164

I've hit two snags so far. One, is that autoTitle uses path, which webpack polyfills but vite does not (there's a simple solution I have working, and I'll submit a PR to storybook soon). Second, the format of the loadable function we are providing to the call to configure does not include the filenames, which means that autoTitle does not name the stories correctly, defaulting to export_map_1, rather than the actual filename. Here is where the loadable is used: https://github.com/storybookjs/storybook/blob/e0c0a1429dc123219dfd74c8c4a1c6bfc9660f74/lib/core-client/src/preview/executeLoadable.ts#L12, and this is how we are currently setting it up: https://github.com/eirslett/storybook-builder-vite/blob/fb289c1cb57c3b929eb5f586e87b7644f97e28be/packages/storybook-builder-vite/codegen-iframe-script.ts#L103-L106.

[joshwooding]

The second snag is reported here with a potential solution #142

[IanVS]

PR to remove path: storybookjs/storybook#17185