Test: Enable Component Governance detection to validate CG at VS Code scale

Re-enable CG detection (skipComponentGovernanceDetection: false) to test whether
CG can handle VS Code's dependency footprint (~2000 npm + 416 Rust crates)
within the 600s timeout. This is a validation step for the OSS tool redesign.

The timeout was already bumped from 60s to 600s in Aug 2024 (ef656d3f) but
CG detection was never re-enabled. This test validates that change.

Related: https://github.com/microsoft/vscode-engineering/issues/2142