.NET Core HelloWorld does not work non-ASCII Path

[CoshUS]

Original issues: aws/aws-sam-cli#2031 and aws/aws-toolkit-vscode#1144

aws_lambda_builders.exceptions.WorkflowUnknownError: DotnetCliPackageBuilder:RunPackageAction - 'utf-8' codec can't decode byte 0x94 in position 308: invalid start byte

[CoshUS]

Cause:
aws_lambda_builders\workflows\dotnet_clipackage\dotnetcli.py
LOG.info(out.decode("utf8").strip())

out (output from dotnet.exe) is encoded in cp437

aws-extensions-for-dotnet-cli outputs using default code page which is set based on system locale.
Console.OutputEncoding was not set.