plugin-legacy can not detect browserslist config

[KAROTT7]

Describe the bug

I am develop a app runs on chrome 61 which don't support es.promise.finally and css property #RGBA by vite + tailwindcss + postcss.
I set "browserslist": [ "chrome 61" ] in package.json, then postcss-preset-env will get browserslist so that convert #RGBA to RGBA(0, 0, 0, 1), but @vitejs/plugin-legacy must be set legacy({ targets: 'chrome 61' }), or can not import 'require("core-js/modules/es.promise.finally.js");'.

Because '@vitejs/plugin-legacy' have default value 'defaults', it should be undefined, I think all tools should share browserslist, it's a better way.

Reproduction

https://stackblitz.com/edit/vitejs-vite-3zzbrs?file=src%2FApp.jsx,vite.config.js,babel.js,dist%2Fassets%2Findex.734b493c.js&terminal=dev

Steps to reproduce

• visit link, npm install, npm run build, then you cannot find require("core-js/modules/es.promise.finally.js")
  for comparing
• run node babel.js, you can see correct code in console.

System Info

System:
    OS: macOS 12.4
    CPU: (8) arm64 Apple M1
    Memory: 100.77 MB / 16.00 GB
    Shell: 5.8.1 - /bin/zsh
  Binaries:
    Node: 16.17.1 - /opt/homebrew/opt/node@16/bin/node
    Yarn: 1.22.17 - /opt/homebrew/bin/yarn
    npm: 8.15.0 - /opt/homebrew/opt/node@16/bin/npm
  Browsers:
    Chrome: 107.0.5304.110
    Safari: 15.5

Used Package Manager

pnpm

Logs

No response

Validations

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[sapphi-red]

Duplicate of #2476