[FEA]: Add a job to CI to verify that devcontainers are up to date

[jrhemstad]

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Area

Infrastructure

Is your feature request related to a problem? Please describe.

As a CCCL developer, I rely on the Dev Containers defined .devcontainer/ for my local development envinroment.

These devcontainer.json files are generated using the .devcontainer/make_devcontainers.sh script that parses the ci/matrix.yaml file and collects the unique versions of CUDA/host compiler and then creates a .devcontainer/ subdirectory for each.

The .devcontainer/devcontainer.json file is treated as the template, and all the other devcontainer.json files are just copies that replace the image: field.

It would be easy for these devcontainer.json files to get out of date if we ever made changes and forgot to run the make_devcontainers.sh script.

Describe the solution you'd like

We should add a job to CI that runs the make_devcontainer.sh script and will fail if there are any changes to any of the files (meaning they are out of date and need to be updated).

Describe alternatives you've considered

No response

Additional context

No response