feat: enable tree-shaking for lib es

[sapphi-red]

Description

This PR enables treeShaking for lib es output. This will reduce output size.
minify removes pure annotations but treeShaking does not remove them.

before (esbuild repl)
--minify + --tree-shaking (esbuild repl)
this PR: --tree-shaking (esbuild repl)

close #8728

Additional context

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What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

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[patak-dev]

This also fixes the other tree shaking issues with lib mode, no?

• Tree-shaking not working in v3 beta #8713
• [Vite version 3.0.0-alpha.9]: Treeshaking does not work with libs. #8464
• Tree Shaking Not Working - React #7473

[sapphi-red]

All of them does not use lib mode, so those are not related.
About #8713 and #8464, it seems to be related to the build time optimization.