Add WSL testing for pyenv-win (#15317)

Adds test coverage for https://github.com/astral-sh/uv/pull/15315

I reproduced the error there, then rebased on #15315 which resolves the
issue.

.github/workflows/ci.yml

@@ -1629,6 +1629,58 @@ jobs:
         run: |
           .venv/bin/python -c "import sys; exit(1) if sys._is_gil_enabled() else exit(0)"
 
+  integration-test-wsl:
+    timeout-minutes: 15
+    needs: build-binary-linux-musl
+    name: "integration test | pyenv on wsl x86-64"
+    runs-on: windows-latest
+    if: ${{ !contains(github.event.pull_request.labels.*.name, 'no-test') && github.event.pull_request.head.repo.fork != true }}
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          persist-credentials: false
+
+      - name: "Download binary"
+        uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
+        with:
+          name: uv-linux-musl-${{ github.sha }}
+
+      - name: "Setup WSL"
+        uses: Vampire/setup-wsl@6a8db447be7ed35f2f499c02c6e60ff77ef11278 # v6
+        with:
+          distribution: Ubuntu-22.04
+
+      - name: "Install pyenv-win"
+        shell: pwsh
+        run: |
+          Write-Host "Installing pyenv-win..."
+          Invoke-WebRequest -UseBasicParsing -Uri "https://raw.githubusercontent.com/pyenv-win/pyenv-win/master/pyenv-win/install-pyenv-win.ps1" -OutFile "./install-pyenv-win.ps1"
+          .\install-pyenv-win.ps1
+
+          # Add pyenv-win to PATH for this session
+          $env:PYENV = "$env:USERPROFILE\.pyenv\pyenv-win"
+          $env:PATH = "$env:PYENV\bin;$env:PYENV\shims;$env:PATH"
+
+          # Add to GITHUB_PATH so WSL can find the shims
+          echo "$env:PYENV\bin" | Out-File -FilePath $env:GITHUB_PATH -Append
+          echo "$env:PYENV\shims" | Out-File -FilePath $env:GITHUB_PATH -Append
+
+          Write-Host "Installing Python 3.11.9 via pyenv-win..."
+          & "$env:PYENV\bin\pyenv.bat" install 3.11.9
+          & "$env:PYENV\bin\pyenv.bat" global 3.11.9
+
+          Write-Host "Verifying pyenv-win installation..."
+          & "$env:PYENV\bin\pyenv.bat" versions
+
+      - name: "Test uv"
+        shell: wsl-bash {0}
+        run: |
+          set -x
+          chmod +x ./uv
+
+          # Check that we don't fail on `pyenv-win` shims
+          ./uv python list -v
+
   integration-test-publish-changed:
     timeout-minutes: 10
     needs: build-binary-linux-libc