Environment variables order affects the build hashes

[mcchrish]

Describe the bug

When defining environment variables depending on the order would result in a different build, and hence different hashes. Example:

---

.env contains:

VITE_1=1
VITE_2=2

vite build results:

> [email protected] build
> vite build

vite v3.2.4 building for production...
✓ 3 modules transformed.
dist/index.html                 0.38 KiB
dist/assets/index.06d1098a.js   0.82 KiB / gzip: 0.47 KiB

---

.env contains:

VITE_2=2
VITE_1=1

vite build results:

> [email protected] build
> vite build

vite v3.2.4 building for production...
✓ 3 modules transformed.
dist/index.html                 0.38 KiB
dist/assets/index.753dce18.js   0.82 KiB / gzip: 0.47 KiB

---

Specifically the env variable replacements have changed console.log({VITE_2:"2",VITE_1:"1",BASE_URL:"/",MODE:"production",DEV:!1,PROD:!0}.VITE_3)

Reproduction

https://github.com/mcchrish/vite-env-test

Steps to reproduce

1. Define .env with content describe above.
2. Run npm run build, notice the file hashes.
3. Define .env with a different order of env as describe above.
4. Run npm run build, and compare the file hashes from the previous build

System Info

System:
    OS: macOS 13.0.1
    CPU: (12) x64 Intel(R) Core(TM) i7-8750H CPU @ 2.20GHz
    Memory: 60.16 MB / 16.00 GB
    Shell: 5.8.1 - /bin/zsh
  Binaries:
    Node: 16.18.0 - /usr/local/bin/node
    Yarn: 1.22.18 - ~/Library/Application Support/npm/bin/yarn
    npm: 8.19.2 - /usr/local/bin/npm
  Browsers:
    Chrome: 107.0.5304.121
    Firefox: 107.0.1
    Safari: 16.1
  npmPackages:
    vite: ^3.2.3 => 3.2.4

Used Package Manager

npm

Logs

No response

Validations

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[bluwy]

Duplicate of #8663. The fix is in v4 but will be backported to v3 in #11189