Agent won't run on multi-arch clusters

[maciej-wilczynski]

Hello, I hit some troubles running this module on multiarch cluster (amd64 mixed with arm64 nodes), https://hub.docker.com/r/hashicorp/tfc-agent isn't built for arm64 and throws error standard_init_linux.go:228: exec user process caused: exec format error . It would be nice to be able to select nodes using node_selector ie:

        node_selector = {
          "kubernetes.io/os"   = "linux"
          "kubernetes.io/arch" = "amd64"
        }

[redeux]

This seems like a reasonable solution given that os and arch are populated automatically by the Kubelet. Are you planning to open a PR for this feature?