Ensure unique codes for all `Log.LogError/Log.LogWarning` calls

[baronfel]

          Just to double check, are logged errors, https://github.com/dotnet/sdk-container-builds/blob/cbaba1ca0632ca1b9d49b1e928102890ee3f55fe/Microsoft.NET.Build.Containers/Tasks/CreateNewImage.cs#L63 for example, to be done in separate PR?

Originally posted by @vlada-shubina in #357 (comment)

[vlada-shubina]

also those messages should be localised.

[baronfel]

Closed as part of #392