Update MSIX packaging so the version conforms to Store requirements

[SteveL-MSFT]

PR Summary

The Windows Store require the last digit of the version to be a zero. Previously we put the Preview number into the last digit. The fix is if
the last digit is not zero, we put that value for Build and set Revision to 0. This will not affect stable versions which uses the Build
as the servicing version and has Revision as 0.

PR Context

Enable publishing the msix to Windows Store.

PR Checklist

• PR has a meaningful title
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• Summarized changes
• Make sure all .h, .cpp, .cs, .ps1 and .psm1 files have the correct copyright header
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  • Not Applicable
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  • Documentation needed
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[ghost]

🎉v7.0.0-preview.5 has been released which incorporates this pull request.:tada:

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