Add Windows ARM baseline coverage for SymSGD predictor test

[vladimir-aubrecht]

Summary

BinaryClassifierSymSgdTest remains skipped on Windows ARM after #7671 because there is no trustworthy platform-specific baseline.

Work

• Run BinaryClassifierSymSgdTest on a native Windows ARM64 environment.
• Add the generated SymSGD baseline files under test/BaselineOutput/Common/SymSGD/win-arm/.
• Remove the Windows ARM early return from BinaryClassifierSymSgdTest.
• Verify the test passes consistently on Windows ARM64.

Context

Follow-up to #7671.

[github-actions]

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