bake does not support compose profiles

When using a compose file with profiles, `bake` throws an error.

Example file:
```yaml
version: '3.9'

services:
  app:
    image: test:latest
    build: .
    profiles:
      - test
```

Output:
```sh
$ docker buildx bake
[+] Building 0.0s (0/0)
error: services.app Additional property profiles is not allowed
```
