port: Added AdaptiveTestingBotComponent (#5394)

[github-actions]

The changes in Added AdaptiveTestingBotComponent (#5394) may need to be ported to maintain parity with microsoft/botbuilder-dotnet.

Converted AdaptiveTestComponentRegistration to AdaptiveTestingBotComponent. Obsoleted AdaptiveTestComponentRegistration and changed to extend DeclarativeComponentRegistrationBridge.

This could be cherry picked to 4.13. Required to convert old test cases using AdaptiveTestComponentRegistration and correct QnAMakerBotComponent

For QnAMakerBotComponent, the original code in QnAMakerComponentRegistration was:

        /// <summary>
        /// Gets JsonConverters for DeclarativeTypes for QnAMaker.
        /// </summary>
        /// <param name="resourceExplorer">resourceExplorer to use for resolving references.</param>
        /// <param name="sourceContext">SourceContext to build debugger source map.</param>
        /// <returns>enumeration of json converters.</returns>
        public IEnumerable<JsonConverter> GetConverters(ResourceExplorer resourceExplorer, SourceContext sourceContext)
        {
            yield return new ArrayExpressionConverter<Metadata>();
            yield return new ObjectExpressionConverter<QnARequestContext>();
        }

Change made to QnAMakerBotComponent to correct the QnARequestContext converter.

Please review and, if necessary, port the changes.

[joshgummersall]

Already got it!