Add the Classiq Provider as an execution backend preference. It contains the AER backends, that used to be inside IBMBackendPreferences, as well as the Nvidia simulator, which used to be in NvidiaBackendPreferences. See
Deprecate the NvidiaBackendPreferences.
Python SDK: Change annotations of input and output QVar types - InputQVar[...] is now written Input[QVar[...]], and likewise for Output.