Windows counterpart of #39127: scripts/install.ps1 `Install-Desktop` runs
`npm run pack` once and throws on the opaque ENOENT a corrupt cached Electron
download produces, with no recovery. Add `Clear-ElectronBuildCache` plus a
purge-and-retry-once on pack failure, mirroring the install.sh fix: remove the
cached electron-*.zip (%LOCALAPPDATA%\electron\Cache + ELECTRON_CACHE /
electron_config_cache overrides) and stale *-unpacked output, then retry so
@electron/get re-downloads with its own SHASUM verification.
Refs #37544.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>