updates test to use less memory for example #236

Job	Run time
Check file changes	20s
Test Intel on ubuntu-22.04	15m 23s
Test on ubuntu-latest	2m 1s
Test on Mac	7m 18s
Test on ubuntu-22.04	2m 0s
Test 2 - fault tpv5	5m 12s
Test 0 - make tests	6m 58s
Test 1 - meshfem3D simple model	4m 17s
Test 3 - layered halfspace	3m 13s
Test 4 - small adjoint	3m 33s
Test 6b - kernel homogeneous halfspace GPU HIP	23m 25s
Test 6a - kernel homogeneous halfspace	8m 54s
Test 5b - kernel homogeneous acoustic GPU HIP	9m 30s
Test 5a - kernel homogeneous acoustic	3m 11s
Test 7 - socal1D	3m 7s
Test 11 - coupling FK	3m 22s
Test 10 - socal1D 1d_cascadia	3m 20s
Test 12 - homogeneous halfspace	2m 37s
Test 13 - poroelastic	3m 2s
Test 14 - PML elastic	2m 34s
Test 15 - PML acoustic	2m 13s
Test 16 - waterlayered halfspace	3m 32s
Test 17 - tomographic model	2m 46s
Test 19 - sep bathymetry	2m 46s
Test 18 - cavity	2m 26s
Test 20 - socal1D HDF5 I/O	3m 19s
Test 21 - meshfem3D simple model w/ ADIOS2	6m 24s
Test 8 - socal1D 1d_socal	3m 8s
Test 9 - socal1D 1d_prem	3m 11s
Test 22 - coupling SPECFEM	5m 32s
	2h 28m 34s

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