updates mesh adjacency setup (using a reverse lookup table) #212

Job	Run time
Check file changes	17s
Test Intel on ubuntu-22.04	24m 49s
Test on Mac	8m 37s
Test on ubuntu-latest	2m 12s
Test on ubuntu-22.04	2m 9s
Test run example 1 - meshfem3D simple model	3m 54s
Test run example 0 - make tests	7m 10s
Test run example 2 - fault tpv5	5m 35s
Test run example 3 - layered halfspace	2m 29s
Test run example 4 - small adjoint	3m 39s
Test run example 10 - homogeneous halfspace	2m 50s
Test run example 11 - poroelastic	3m 17s
Test run example 13 - PML acoustic	2m 27s
Test run example 6 - socal1D 1d_socal	3m 25s
Test run example 5 - socal1D	3m 31s
Test run example 9 - coupling FK	3m 49s
Test run example 7 - socal1D 1d_prem	3m 26s
Test run example 8 - socal1D 1d_cascadia	3m 53s
Test run example 14 - waterlayered halfspace	3m 49s
Test run example 12 - PML elastic	2m 47s
Test run example 15 - tomographic model	3m 5s
Test run example 16 - cavity	2m 40s
Test run example 17 - sep bathymetry	2m 56s
Test run example 18 - socal1D hdf5 i/o	4m 7s
Test run example 19 - meshfem3D simple model w/ ADIOS2	6m 35s
	1h 53m 28s

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