Ask for user consent if wsl is active during store updates.

[chemwolf6922]

Summary of the Pull Request

Check if WSL is active before installing the msi during a msix installation. If so, ask the user if they would like to shutdown wsl and apply the update. If declined or there is no active user session, the updated will be deferred to the next wslinstaller service start, likely next boot.

PR Checklist

• Closes: WSL2 shut down without warning while I was using it, because Windows Store began to update it #8169 Why WSL updates itself regardless of any running processes? #12675
• 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

Add headless test without the user prompt:
InstallerTests::MsixUpgradeDefer

User prompt manually tested:

[Copilot]

Copilot encountered an error and was unable to review this pull request. You can try again by re-requesting a review.

[Copilot]

Pull request overview

Copilot reviewed 13 out of 13 changed files in this pull request and generated 3 comments.