fix(build): "npm run package" fails on Windows

[rbbarad]

Use shell for execFileSync during extension packaging on Windows OS

Problem

A recent node update has introduced an issue with spawnSync (execFileSync) on Windows. An issue has been filed for this here nodejs/node#52554.

This is affecting the packageExtension step for Windows OS on the latest Node versions (Node v20.12.2), giving the following error:

> ts-node ./scripts/build/handlePackageJson

<ref *1> Error: spawnSync vsce ENOENT
    at Object.spawnSync (node:internal/child_process:1124:20)
    at spawnSync (node:child_process:876:24)
    at Object.execFileSync (node:child_process:919:15)
    at main (C:\Users\rbbarad\Desktop\vscode-toolkit\aws-toolkit-vscode-staging\scripts\package.ts:156:23)
    at Object.<anonymous> (C:\Users\rbbarad\Desktop\vscode-toolkit\aws-toolkit-vscode-staging\scripts\package.ts:181:1)
    at Module._compile (node:internal/modules/cjs/loader:1369:14)
    at Module.m._compile (C:\Users\rbbarad\Desktop\vscode-toolkit\aws-toolkit-vscode-staging\node_modules\ts-node\src\index.ts:1618:23)
    at Module._extensions..js (node:internal/modules/cjs/loader:1427:10)
    at Object.require.extensions.<computed> [as .ts] (C:\Users\rbbarad\Desktop\vscode-toolkit\aws-toolkit-vscode-staging\node_modules\ts-node\src\index.ts:1621:12)
    at Module.load (node:internal/modules/cjs/loader:1206:32) {
  errno: -4058,
  code: 'ENOENT',
  syscall: 'spawnSync vsce',
  path: 'vsce',
  spawnargs: [ 'package', '--ignoreFile', '../.vscodeignore.packages' ],
  error: [Circular *1],
  status: null,
  signal: null,
  output: null,
  pid: 0,
  stdout: null,
  stderr: null
}

Solution

This PR fixes the issue by using a shell to run execFileSync when on Windows OS. This is because vsce is a .cmd file which needs a shell to run.

Testing

• Ran npm install, npm run compile, npm run package locally. confirmed packaging was successful

Related Issue(s), If Filed

• Use shell for execFileSync during extension packaging aws-toolkit-azure-devops#552
• Command run failed with error : spawn EINVAL nodejs/node#52554

License

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.