Add SM 6.9 bringup tests - #3223

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: misyltoad/gcc-problem-matcher@v3. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

private field 'm_reserved' is not used [-Wunused-private-field]

private field 'm_reserved' is not used [-Wunused-private-field]

captured structured bindings are a C++20 extension [-Wc++20-extensions]

captured structured bindings are a C++20 extension [-Wc++20-extensions]

private field 'm_reserved' is not used [-Wunused-private-field]

private field 'm_reserved' is not used [-Wunused-private-field]

private field 'm_reserved' is not used [-Wunused-private-field]

private field 'm_reserved' is not used [-Wunused-private-field]

private field 'm_reserved' is not used [-Wunused-private-field]