Add build/ExtractCompressNuGet.ps1

[BruceHaley]

This will be run in the build instead of build/packer.dll. (Binaries should not be included in the source repository.)

Packer.dll is to be removed in a later pull request after the builds have been switched over to running ExtractCompressNuGet.ps1.

[coveralls]

Pull Request Test Coverage Report for Build 54187

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 76.186%

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Totals
Change from base Build 54062:	0.0%
Covered Lines:	4402
Relevant Lines:	5778

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💛 - Coveralls

[cleemullins]

No issues found in Microsoft.Bot.Builder.dll
No issues found in Microsoft.Bot.Builder.AI.Luis.dll
No issues found in Microsoft.Bot.Builder.AI.QnA.dll
No issues found in Microsoft.Bot.Builder.ApplicationInsights.dll
No issues found in Microsoft.Bot.Builder.Azure.dll
No issues found in Microsoft.Bot.Builder.Dialogs.dll
No issues found in Microsoft.Bot.Builder.TemplateManager.dll
No issues found in Microsoft.Bot.Configuration.dll
No issues found in Microsoft.Bot.Connector.dll
No issues found in Microsoft.Bot.Schema.dll