Make sfs-client a vcpkg port

[florelis]

📖 Description

Removes the git-subtree for sfs-client and replaces it with a local vcpkg port. This port is based on the template provided by sfs-client

• Updated the script that creates a local overlay to fetch this port.
• Added a small patch to fix a build error in the port.
• Created a new folder for the custom port patches. This means duplicating the files, but prevents losing them when re-creating the ports.
• Added a job to the build pipeline to ensure that the ports still match what the creation script produces, to ensure they're kept in sync.

This fixes a CG alert for c-ares triggered by having sfs-client's cgmanifest checked in, which caused CG to consider that as the version used despite us updating the dependency.

🔗 References

🔍 Validation

It builds :D

✅ Checklist

• Signed the Contributor License Agreement
• Linked to an issue
• Updated Release Notes (if applicable)
• Updated documentation (if applicable)
• Updated Copilot instructions (if build, architecture, or conventions changed)

📋 Issue Type

• Bug fix
• Feature
• Task

Microsoft Reviewers: Open in CodeFlow