Rm noexcept specifier from ISteppable::Step, and add it to GetStepSize

Signed-off-by: Martin Stump <martin.stump@mercedes-benz.com>

include/MantleAPI/Execution/i_steppable.h

@@ -25,11 +25,11 @@ struct ISteppable
 
   /// \brief Calculate the new state
   /// \param[in] size The time step size
-  virtual void Step(Time size) noexcept = 0;
+  virtual void Step(Time size) = 0;
 
   /// \brief Get the time step size
   /// \return The time step size
-  [[nodiscard]] virtual std::optional<mantle_api::Time> GetStepSize() const = 0;
+  [[nodiscard]] virtual std::optional<mantle_api::Time> GetStepSize() const noexcept = 0;
 };
 
 }  // namespace mantle_api