The changes in Added SetSpeakMiddleware to Runtime (#5343) may need to be ported to maintain parity with microsoft/botbuilder-dotnet.

Fixes #5266

The middleware was taken from the previous runtime.

This makes SetSpeakMiddleware available to Runtime via the "features" node in config (as it does for other Runtime supported middleware).

Of special note: I put SetSpeakMiddleware in BotBuilder. But we may want it elsewhere?

Please review and, if necessary, port the changes.