PBMR400 test is failing with use_legacy_initial_residual_evaluation_bahavior flag off

[YaqiWang]

Reason

A new flag was introduced in MOOSE use_legacy_initial_residual_evaluation_bahavior. When it is turned off, PBMR400 test transient_neutronics_only is failing with an uncovered solve reaching the maximum number of linear iterations at the first timestep and the first nonlinear Newton iteration.

Design

A temporary solution is to add Executioner/use_pre_SMO_residual = true, which essentially tells MOOSE to keep the current legacy behavior for the test if understand correctly. The more proper fix is probably to understand what is causing the divergence and fix it directly.

Impact

Make Griffin application able to turn this legacy flag off.