[FEA] Utilize a built devcontainer image for the CI runner

[mdemoret-nv]

One downside of using devcontainers currently is they don't provide the exact same environment that the CI runner uses. So its possible to get errors in CI that do not show up locally due to different versions, configs, etc.

We can utilize the devcontainer CLI to export images that we could then use for the CI runner. This would eliminate many differences between the CI environment and the environment developers use.

[cwharris]

This goes along with the #rapidsai/devcontainers work we've been doing. I'm looking forward to getting a prototype of this up and running. 👍