Add an UpdateViews parameter to the existing object method. The legacy
command calls computeStatisticsAndUpdateViews() (which also creates a
view if none exists) while the object method only computes; the default
(false) keeps the object method behavior and the Ricf forwarder passes
true. RicfComputeCaseGroupStatistics resolves the statistics cases and
loops over them.
GridCaseGroup.compute_statistics(case_ids=...) in Python now loops over
statistics_cases() and emits a DeprecationWarning.