This patch changes the way plugin objects used with Scripted Interfaces
are created.
Instead of implementing a different SWIG method to create the object for
every scripted interface, this patch makes the creation more generic by
re-using some of the ScriptedPythonInterface templated Dispatch code.
This patch also improves error handling of the object creation by
returning an `llvm::Expected`.
Signed-off-by: Med Ismail Bennani <ismail@bennani.ma>
Signed-off-by: Med Ismail Bennani <ismail@bennani.ma>