Fix some logging fallout to non-zero MPI ranks

In multi-rank MPI runs, some log messages were written by all ranks instead
of only rank 0, causing "logging fallout" files (e.g., CASE.1.DBG, CASE.2.DBG).

Changes:
- Add rank check before calling logPressures() in FlowThresholdPressure
- Make TimeStepControl verbose flag rank-aware in createController()

This ensures only rank 0 produces log output for these code paths.

opm/simulators/flow/FlowThresholdPressure.hpp

@@ -156,7 +156,9 @@ private:
         for (unsigned i = 0; i < this->thpresDefault_.size(); ++i)
             this->thpresDefault_[i] = gridView.comm().max(this->thpresDefault_[i]);
 
-        this->logPressures();
+        if (gridView.comm().rank() == 0) {
+            this->logPressures();
+        }
     }
 
     const Simulator& simulator_;

opm/simulators/timestepping/AdaptiveTimeStepping.cpp

@@ -8,6 +8,7 @@
 
 #include <opm/input/eclipse/Units/Units.hpp>
 
+#include <opm/simulators/flow/FlowGenericVanguard.hpp>
 #include <opm/simulators/timestepping/AdaptiveSimulatorTimer.hpp>
 #include <opm/simulators/timestepping/ConvergenceReport.hpp>
 
@@ -169,7 +170,8 @@ std::tuple<TimeStepControlType, std::unique_ptr<TimeStepControlInterface>, bool>
 createController(const UnitSystem& unitSystem)
 {
     const double tol =  Parameters::Get<Parameters::TimeStepControlTolerance>();
-    const bool verbose = Parameters::Get<Parameters::TimeStepVerbosity>();
+    const auto& comm = FlowGenericVanguard::comm();
+    const bool verbose = Parameters::Get<Parameters::TimeStepVerbosity>() && (comm.rank() == 0);
     using RetVal = std::tuple<TimeStepControlType, std::unique_ptr<TimeStepControlInterface>, bool>;
     using Func = std::function<RetVal()>;
     const auto creators = std::unordered_map<std::string, Func> {