[Tracking]: Optimize bundle size

[GiveMe-A-Name]

What subject does this issue tracking?

According the article - Downsize your JavaScript: Mastering Bundler Optimizations, in some cases, Rspack's bundle size does not meet expectations. This may be related to minimizer, tree shaking, runtime templates, etc.

This issue is used to track on the research and optimization of Rspack's output bundle size.

Reduce bundle size

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1. feat: set default SWC minimizer passes to 2 to reduce bundle size #8853
   release: feature team +2
   
2. Align module exports with webpack #5316
   feat +1
   
3. [Feature]: treeshaking unused class member #8942
   feat team +2
   
4. Minify failed when meet some webpack comment swc-project/swc#9823
   C-bug +1