Mark GetHTTP and PutHTTP as @Deprecated

The GetHTTP and PutHTTP processors are legacy processors, introduced before the general-purpose InvokeHTTP was available. Because of the naming conventions and implied purpose, many users still select these processors, when feature development has ceased on them and InvokeHTTP should be used for these scenarios.

These processors should be marked with a deprecation annotation in code, and have some kind of labeling, description update, and on-canvas marking (if possible) to encourage users to no longer select them for new flow development, and migrate existing use to InvokeHTTP. They should be removed in future releases.