Deprecation warnings from TimeLoop+Python
``` python/common/timeloop.hh:54:14: warning: 'setCheckPoint' is deprecated: Use setCheckpoint(begin, end) instead. Will be removed after release 3.9. [-Wdeprecated-declarations] self.setCheckPoint(checkPoints); ^ python/common/timeloop.hh:62:5: note: in instantiation of function template specialization 'Dumux::Python::registerTimeLoop<double>' requested here registerTimeLoop(scope, cls); ^ python/dumux/common/_common.cc:26:13: note: in instantiation of function template specialization 'Dumux::Python::registerTimeLoop<double>' requested here Python::registerTimeLoop<double>(module); ^ dumux/common/timeloop.hh:646:10: note: 'setCheckPoint' has been explicitly marked deprecated here void setCheckPoint(const std::vector<ScalarOrDuration>& checkPoints) ^ python/dumux/common/_common.cc:13: python/common/timeloop.hh:54:14: warning: 'setCheckPoint<double>' is deprecated: Use setCheckpoint(begin, end) instead. Will be removed after release 3.9. [-Wdeprecated-declarations] self.setCheckPoint(checkPoints); ^ dumux/common/timeloop.hh:645:7: note: 'setCheckPoint<double>' has been explicitly marked deprecated here [[deprecated("Use setCheckpoint(begin, end) instead. Will be removed after release 3.9.")]] ^ 2 warnings generated. ```
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