port: Move TestAdapter and TestFlow to Microsoft.Bot.Builder.Testing package. (#6159)

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The changes in Move TestAdapter and TestFlow to Microsoft.Bot.Builder.Testing package. (#6159) may need to be ported to maintain parity with microsoft/botbuilder-dotnet.

Fixes #6106

Description

Move TestAdapter and TestFlow from Microsoft.Bot.Builder.Adapters to Microsoft.Bot.Builder.Testing package and fix any projects that depend on these classes to include references to the Microsoft.Bot.Builder.Testing package as needed.

Specific Changes

Moved TestAdapter and TestFlow to Microsoft.Bot.Builder.Testing package. Added references to Microsoft.Bot.Builder.Testing to the following test projects that used either TestAdapter to TestFlow:

Microsoft.Bot.Builder.Ai.Luis.Tests Microsoft.Bot.Builder.AI.Orchestrator.tests Microsoft.Bot.Builder.AI.QnA.Tests Microsoft.Bot.Builder.AI.LuisV3.Tests Microsoft.Bot.Builder.ApplicationInsights.Tests Microsoft.Bot.Builder.Tests.Common Microsoft.Bot.Builder.ApplicationInsights.Core.Tests

Testing

Solution was built and unit tests executed to ensure all package references were corrected.

Please review and, if necessary, port the changes.