New-xDscResource created files encoding should be in default approved GitHub contribution encoding

[bgelens]

When we use New-xDscResource currently, we have to convert the produced file encoding before we can contribute to GitHub PowerShell DSC repo's or the Pester tests will fail on correct encoding tests. Most files need their encoding changed to UTF8 and the schema.mof needs to change to ASCII. Since these encodings are dictated by the Meta tests and therefore are defined as the defaults, why not make them the default for New-xDscResource?