Add wsldevicehostproxystub.dll to the list of target to build during release builds

[Blue (OneBlue)]

Summary of the Pull Request

This change adds wsldevicehostproxystub.dll to the list of target to build. Without it, the release pipeline fails since that file isn't built

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

Updates the Azure DevOps build pipeline’s “release-sign-and-stage” target list so wsldevicehostproxystub.dll is explicitly built (and therefore eligible for signing/staging) alongside the other primary WSL binaries.

Changes:

• Add wsldevicehostproxystub to the default CMake build target set used by the pipeline.
• Add wsldevicehostproxystub.dll to the signing/staging Pattern list so it’s included in the signed artifacts set.

---

💡 Add a code-review agent skill or configure MCP servers for context-aware, tailored reviews. Learn more in the docs.