[Nicholas L (nmlud21)]

Summary

Fix the CodeQL workflow, which fails during Linux autobuild because UserSim requires Windows SDK/WDK headers.

• Switch to the Windows VS 2026 runner used by the existing build workflow.
• Check out submodules recursively and generate Catch2 projects for x64.
• Replace autobuild with an explicit MSBuild restore and rebuild in manual CodeQL build mode.
• Update SHA-pinned CodeQL actions to v4.38.3 and checkout to v7.0.1.

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