fix: set scripts imported by HTML moduleSideEffects=true

[sapphi-red]

Description

When setting moduleSideEffects: false, all scripts gets tree-shaked and the built output becomes empty. This is because we convert HTML files into a JS file just containing side effect imports that points to the href attr of script tags.

While the behavior is correct (the scripts do have a side-effect and setting it false is a lie) and kind of expected, it is more easier to configure if these scripts are marked as moduleSideEffects: true as in most cases you won't rely on side-effect imports. (The correct way of fixing this is to set treeshake.moduleSideEffects: (id) => scriptsImportedByHtml.includes(id) instead.)

fixes #16720
fixes #17911

This PR reverts #12786 as this fix covers that one as well. (To fix that one correctly, the sideEffects field should include the scripts imported by the HTML file.)

[patak-dev]

/ecosystem-ci run

[vite-ecosystem-ci]

📝 Ran ecosystem CI on cb81d59: Open

suite	result	latest scheduled
analogjs	❌ failure	✅ success
astro	❌ failure	❌ failure
remix	❌ failure	❌ failure
sveltekit	❌ failure	❌ failure
vike	❌ failure	❌ failure
vite-environment-examples	✅ success	❌ failure
vite-plugin-svelte	❌ failure	❌ failure
vitest	❌ failure	❌ failure

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