Lint docker bake file

### What feature do you want to see added?

I learnt about `hclfmt` which checks and formats HCL files.

I'd like to add it in a validation step in the pipeline, but unfortunatelly the original repo is archived since 2018: https://github.com/fatih/hclfmt

I found that this code is also now living in https://github.com/hashicorp/hcl/blob/main/cmd/hclfmt/main.go, but didn't find ay corresponding release asset.

I compiled and used it locally with success against docker bake files:
```
$ hclfmt -check -w docker-bake.hcl
```

My question is: how could I integrate it in our repos?

Other similar tools are using docker images wrapped in scripts, ex: https://github.com/jenkinsci/docker/blob/master/tools/hadolint

Should I...
- Create a docker image based on https://github.com/hashicorp/hcl/blob/main/cmd/hclfmt/main.go
- Build https://github.com/hashicorp/hcl/blob/main/cmd/hclfmt/main.go on the fly? (Would require proper go tooling in agents, and would be a bit wasteful)
- Simply include my built version in the repo?
- Find another alternative?
- Give up?

### Upstream changes

_No response_

### Are you interested in contributing this feature?

Yes.

Start with docker-bake.hcl and the HashiCorp hclfmt entry point at cmd/hclfmt/main.go, then compare the Jenkins hadolint wrapper as an example of pipeline integration. Determine which packaging approach is appropriate for this repository and define completion as an automated validation step that checks the Docker Bake files.

Written by the indexing model from the issue text.