fix: handle namespace import and dynamic import interop consistently

[XiSenao]

Description

fix #15542
fix #15018

Additional context

From the following repository examples:
https://github.com/XiSenao/exceptional-performance-of-loading-commonjs-modules/blob/main/src/main.js

it can be found that using namespace imports to load CommonJS modules results in inconsistent development and build behaviors. In most cases, dynamic import behaves as expected. That is to say, it seems effective to rewrite in the following way.

import('${rewrittenUrl}').then(m => m.default && m.default.__esModule ? m.default : ({ ...m.default, default: m.default }))

However, when exploring how the @rollup/plugin-commonjs plugin interacts with rollup, it seems that rollup will merge the transpiled ESM product through

mergeNamespaces({
  __proto__: null,
  default: getDefaultExportFromCjs(rectClamp)
}, [rectClamp])

The logic of the rollup processing and the rewritten dynamic import are somewhat similar, but it can be found that there are still boundary scenarios that will cause inconsistencies between development and build behaviors for dynamic imports(e.g. only export Array or String).

---

What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

Before submitting the PR, please make sure you do the following

• Read the Contributing Guidelines, especially the Pull Request Guidelines.
• Check that there isn't already a PR that solves the problem the same way to avoid creating a duplicate.
• Provide a description in this PR that addresses what the PR is solving, or reference the issue that it solves (e.g. fixes #123).
• Update the corresponding documentation if needed.
• Ideally, include relevant tests that fail without this PR but pass with it.

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[patak-dev]

/ecosystem-ci run

[vite-ecosystem-ci]

📝 Ran ecosystem CI on 659e82e: Open

suite	result	latest scheduled
analogjs	✅ success	✅ success
astro	✅ success	✅ success
histoire	✅ success	✅ success
ladle	✅ success	✅ success
laravel	❌ failure	❌ failure
marko	✅ success	✅ success
nuxt	❌ failure	✅ success
nx	✅ success	✅ success
previewjs	✅ success	✅ success
qwik	❌ failure	❌ failure
rakkas	❌ failure	✅ success
remix	❌ failure	❌ failure
sveltekit	✅ success	✅ success
unocss	✅ success	✅ success
vike	❌ failure	❌ failure
vite-plugin-pwa	✅ success	✅ success
vite-plugin-react	✅ success	✅ success
vite-plugin-react-pages	✅ success	✅ success
vite-plugin-react-swc	✅ success	✅ success
vite-plugin-svelte	✅ success	✅ success
vite-plugin-vue	✅ success	✅ success
vite-setup-catalogue	✅ success	✅ success
vitepress	✅ success	✅ success
vitest	✅ success	✅ success

[patak-dev]

/ecosystem-ci run

[vite-ecosystem-ci]

📝 Ran ecosystem CI on 0c75563: Open

suite	result	latest scheduled
analogjs	✅ success	✅ success
astro	✅ success	✅ success
histoire	✅ success	✅ success
ladle	✅ success	✅ success
laravel	❌ failure	❌ failure
marko	✅ success	✅ success
nuxt	✅ success	✅ success
nx	✅ success	✅ success
previewjs	✅ success	✅ success
qwik	❌ failure	❌ failure
rakkas	✅ success	✅ success
remix	❌ failure	❌ failure
sveltekit	✅ success	✅ success
unocss	✅ success	✅ success
vike	❌ failure	❌ failure
vite-plugin-pwa	✅ success	✅ success
vite-plugin-react	✅ success	✅ success
vite-plugin-react-pages	✅ success	✅ success
vite-plugin-react-swc	✅ success	✅ success
vite-plugin-svelte	✅ success	✅ success
vite-plugin-vue	✅ success	✅ success
vite-setup-catalogue	✅ success	✅ success
vitepress	✅ success	✅ success
vitest	✅ success	✅ success