fix: remove regex replacement for lib mode

[fnlctrl]

Description

Fix #14065 lib mode hanging for umd build, by removing regex replacements

Additional context

The original fix #7948 used regex for string replacement to avoid global esbuild helpers. However, it seems these can be removed now, because all the tests pass without them, probably due to updated esbuild (0.14.27 then vs 0.18.10 now).

The regex approach also doesn't completely fix the original issue, some reproductions with the latest vite (4.4.9):

• UMD build, minify: true https://stackblitz.com/edit/vitejs-vite-9frvl5?file=vite.config.ts,index.tsx&terminal=build
• UMD build, minify: false https://stackblitz.com/edit/vitejs-vite-z5wdig?file=vite.config.ts,index.ts&terminal=build

Given numerous preivous attemps #8110 #8741 #10905 at fixing regex performance, I think this is an indication that regex isn't the right solution in this scenario, and we should probably remove it altogether to avoid future performance issues.

In conclusion, we need a better fix for the global esbuild helpers. Removing regex for now appears to be safe because a). all tests pass and b). the original issue is still largely unfixed (easily reproducable - probably already in many people's builds)

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What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

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[fnlctrl]

🤦‍♂️seems I forgot to run build before running tests locally.. I'll investigate more for a proper fix, closing for now