Make the sample WSL_POST_BUILD_COMMAND more resilient

[OneBlue]

Summary of the Pull Request

This change updates the sample WSL_POST_BUILD_COMMAND to include the usual -ExecutionPolicy Bypass -NoProfile -NonInteractive arguments when calling powershell

PR Checklist

• Closes: Link to issue #xxx
• Communication: I've discussed this with core contributors already. If work hasn't been agreed, this work might be rejected
• Tests: Added/updated if needed and all pass
• Localization: All end user facing strings can be localized
• Dev docs: Added/updated if needed
• Documentation updated: If checked, please file a pull request on our docs repo and link it here: #xxx

Detailed Description of the Pull Request / Additional comments

Validation Steps Performed

[Copilot]

Pull Request Overview

This PR enhances the PowerShell post-build command in the sample user configuration by adding execution policy and profile flags to ensure the deployment script runs reliably in various PowerShell execution environments.

Key changes:

• Updated the commented-out WSL_POST_BUILD_COMMAND example to include PowerShell flags that bypass execution policy restrictions and disable profile loading