fix: use nodeLikeBuiltins for ssr.target: 'webworker' without noExternal: true

[sapphi-red]

Description

Previously the Cannot bundle Node.js built-in error was only shown when noExternal: true is set.
https://github.com/vitejs/vite/pull/18584/files#diff-9b81bb364c02eab9494a7d27a5effc400cacbffd3b8f349c192f890c37bfc83fL429-L445
To align with that, this PR sets nodeLikeBuiltins by default for ssr.target: 'webworker' without noExternal: true.

This should fix the ecosystem-ci failure of waku: https://github.com/vitejs/vite-ecosystem-ci/actions/runs/13024909071/job/36332279608

refs #18584

[sapphi-red]

/ecosystem-ci run

[pkg-pr-new]

Open in Stackblitz

npm i https://pkg.pr.new/vite@19313

commit: 4fcd66f

[vite-ecosystem-ci]

📝 Ran ecosystem CI on 4fcd66f: Open

suite	result	latest scheduled
astro	❌ failure	❌ failure
histoire	❌ failure	❌ failure
nuxt	❌ failure	❌ failure
qwik	❌ failure	❌ failure
redwoodjs	❌ failure	❌ failure
vitest	❌ failure	❌ failure
waku	✅ success	❌ failure

✅ analogjs, ladle, laravel, marko, previewjs, quasar, rakkas, react-router, storybook, sveltekit, unocss, vike, vite-environment-examples, vite-plugin-pwa, vite-plugin-react, vite-plugin-react-swc, vite-plugin-svelte, vite-plugin-vue, vite-setup-catalogue, vitepress, vuepress