[T] Update reference files for M/Excavation benchmark

.../Excavation/time_linear_excavation_A2_ts_0_t_0.000000.vtu

...Excavation/time_linear_excavation_A2_ts_10_t_2.600000.vtu

...Excavation/time_linear_excavation_A2_ts_11_t_2.800000.vtu

...Excavation/time_linear_excavation_A2_ts_12_t_3.000000.vtu

...Excavation/time_linear_excavation_A2_ts_13_t_3.200000.vtu

...Excavation/time_linear_excavation_A2_ts_14_t_3.400000.vtu

...Excavation/time_linear_excavation_A2_ts_15_t_3.600000.vtu

...Excavation/time_linear_excavation_A2_ts_16_t_3.800000.vtu

...Excavation/time_linear_excavation_A2_ts_17_t_4.000000.vtu

...Excavation/time_linear_excavation_A2_ts_18_t_4.200000.vtu

...Excavation/time_linear_excavation_A2_ts_19_t_4.400000.vtu

.../Excavation/time_linear_excavation_A2_ts_1_t_0.500000.vtu

...Excavation/time_linear_excavation_A2_ts_20_t_4.600000.vtu

...Excavation/time_linear_excavation_A2_ts_21_t_4.800000.vtu

...Excavation/time_linear_excavation_A2_ts_22_t_5.000000.vtu

...Excavation/time_linear_excavation_A2_ts_23_t_5.200000.vtu

...Excavation/time_linear_excavation_A2_ts_24_t_5.400000.vtu

...Excavation/time_linear_excavation_A2_ts_25_t_5.600000.vtu

...Excavation/time_linear_excavation_A2_ts_26_t_5.800000.vtu

...Excavation/time_linear_excavation_A2_ts_27_t_6.000000.vtu