chore: revert to electron@39.6.0

[deepak1556]

For #298179

[Copilot]

Pull request overview

This PR reverts the Electron version from 39.6.1 back to 39.6.0 to address issue #298179, where clicking the "restart to update" button in Insiders closes VS Code without updating or restarting. The revert includes updating package dependencies, checksums, and build configuration to ensure consistency with Electron 39.6.0.

Changes:

• Downgraded Electron from 39.6.1 to 39.6.0 across all dependency files
• Updated Electron checksums for all platforms and architectures
• Modified Windows setup build logic to disable embedded product info handling

Reviewed changes

Copilot reviewed 5 out of 6 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
package.json	Reverted electron devDependency from 39.6.1 to 39.6.0
package-lock.json	Updated electron package version, resolved URL, and integrity hash to 39.6.0
cgmanifest.json	Updated Electron component git commit hash and tag from 39.6.1 to 39.6.0
build/gulpfile.vscode.win32.ts	Hardcoded isInsiderOrExploration to false (critical issue identified)
.npmrc	Updated electron target version from 39.6.1 to 39.6.0 and ms_build_id from 13369494 to 13330601
build/checksums/electron.txt	Replaced all checksums with Electron 39.6.0 versions for all platforms and build artifacts