Update samples to support package prefixes for ids

[chrimc62]

This issue describes the SDK changes to support package prefixes like MyPackage#CoolStuff.en-us.lg in resource ids for dialog, LU, QNA and LG files including a new import statement. https://github.com/microsoft/botbuilder-dotnet/issues/5298

We need to update samples that depend on packages to use the new syntax for package ids in dialog files and the import syntax in LG/LU/QnA files.