Changes the warnings associated commands to use the new ApiExcpetions,
and `warnings` in the return status now returns a list of error object V2.

To do that needed to improve the way CommandResult was built, so it always
had a status map so the CommandProcessor could append a warning. To do that
expanded the CommandResultBuilder added for the OperationAttempts, removed
the many overloads used for CommandResult, and updated all creation of the
CommandResult to use the builder.

See also #1518 to continue this