BuildImageFromDockerfileAsync is passing AuthConfigs not as Header X-Registry-Config.

[jehof]

According to the documentation of the Docker API the AuthConfigs for other registries need to be passed as Header X-Registry-Config (https://docs.docker.com/engine/api/v1.40/#operation/ImageBuild), but they are passed as normal parameters (https://github.com/microsoft/Docker.DotNet/blob/5cb89ed1c8630d8c2077135e4048290076f808f0/src/Docker.DotNet/Endpoints/ImageOperations.cs#L46)

https://github.com/microsoft/Docker.DotNet/blob/5cb89ed1c8630d8c2077135e4048290076f808f0/src/Docker.DotNet/Models/ImageBuildParameters.Generated.cs#L73

We currently have the issue, that images are pulled from global docker registry, but not from out internal docker registry (even if we are logged in to the registry). Is seems that BuildImageFromDockerfileAsync needs explicit registry auth information. See also https://docs.docker.com/engine/api/v1.40/#section/Authentication