Buildkit 0.13 introduced support for [multiple exporters](https://docs.docker.com/build/exporters/#multiple-exporters). We currently return an error in these situations. Instead, inspect the builder's version when loading the node and relax this error if we see it's running at least 0.13. Fixes https://github.com/pulumi/pulumi-docker-build/issues/21.
This upgrades pulumi-go-provider to latest. Code was automatically migrated using a slightly modified patch described [here](https://github.com/pulumi/pulumi-go-provider/pull/227#issuecomment-2073962385). --------- Co-authored-by: Ian Wahbe <ian@wahbe.com>
This brings over the initial buildx prototype from pulumi/pulumi-docker and fixes various build and release issues.