fix(ssr): inject identity function at the top

[sapphi-red]

Description

This PR should fix marko's fail in #9981 (comment).

[sapphi-red]

The output without the fix is:

const __vite_ssr_import_0__ = await __vite_ssr_import__("./foo", {"importedNames":["foo"]});


__vite_ssr_exports__.default = __vite_ssr_identity__(__vite_ssr_import_0__.foo)()
const __vite_ssr_import_1__ = await __vite_ssr_import__("./bar");
const __vite_ssr_identity__ = v => v;

Object.defineProperty(__vite_ssr_exports__, "bar", { enumerable: true, configurable: true, get(){ return __vite_ssr_import_1__ }});
console.log(bar)

Note that __vite_ssr_identity__ is called before declaration.

[sapphi-red]

/ecosystem-ci run

[vite-ecosystem-ci]

📝 Ran ecosystem CI on 0c743b5: Open

suite	result	latest scheduled
astro	❌ failure	❌ failure
previewjs	❌ failure	✅ success
redwoodjs	❌ failure	❌ failure
remix	❌ failure	❌ failure
sveltekit	❌ failure	❌ failure
vike	❌ failure	❌ failure
vite-plugin-svelte	❌ failure	❌ failure
vitest	❌ failure	❌ failure

✅ analogjs, histoire, ladle, laravel, marko, nuxt, quasar, qwik, rakkas, storybook, unocss, vite-environment-examples, vite-plugin-pwa, vite-plugin-react, vite-plugin-react-swc, vite-plugin-vue, vite-setup-catalogue, vitepress, vuepress

[sapphi-red]

Vike had a similar error (https://github.com/vitejs/vite-ecosystem-ci/actions/runs/11496916712/job/31999518321#step:8:1969) and that is fixed by this PR too.