Add consistency test for reading Gmsh binary

input msh file.

fem/tests/ElmerGridConvertGmshBinary/CMakeLists.txt

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+INCLUDE(test_macros)
+INCLUDE_DIRECTORIES(${CMAKE_BINARY_DIR}/fem/src)
+
+CONFIGURE_FILE(case.sif case.sif COPYONLY)
+
+file(COPY ELMERSOLVER_STARTINFO binary.msh DESTINATION "${CMAKE_CURRENT_BINARY_DIR}/")
+
+ADD_ELMER_TEST(ElmerGridConvertGmshBinary LABELS quick)

fem/tests/ElmerGridConvertGmshBinary/ELMERSOLVER_STARTINFO

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+case.sif

fem/tests/ElmerGridConvertGmshBinary/binary.geo

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+// Gmsh project created on Sat Dec 21 08:30:08 2024
+SetFactory("OpenCASCADE");
+//+
+Box(1) = {0, 0, 0, 20, 20, 20};
+//+
+Physical Surface("side", 13) = {6};
+//+
+Physical Surface("top", 14) = {4};
+//+
+Physical Surface("other", 15) = {1, 5, 2, 3};
+//+
+Physical Volume("body1", 16) = {1};

fem/tests/ElmerGridConvertGmshBinary/case.sif

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+! Consistency test for workflow where Gmsh binary file is converted with ElmerGrid
+!
+! R.B.  21.12.2024
+
+Header
+  CHECK KEYWORDS Warn
+  Mesh DB "." "mesh"
+  Include Path ""
+  Results Directory ""
+End
+
+Simulation
+  Max Output Level = 5
+  Coordinate System = "Cartesian"
+  Simulation Type = "Steady State"
+  Steady State Max Iterations = 1
+  Output Intervals = 0
+
+  Post File = case.vtu
+End 
+
+Constants
+  Gravity(4) = 0 -1 0 9.82
+  Stefan Boltzmann = 5.67e-08
+End
+
+Body 1
+  Name = "Body"
+  Body Force = 1
+  Equation = 1
+  Material = 1
+End
+
+Equation 1
+  Name = "Equations"
+  Active Solvers(1) = 2
+End
+
+Solver 1
+  Equation = "CheckMesh"
+  Procedure = "MeshChecksum" "MeshChecksum"
+  Reference Values(8) = 2667 584640 1160 1051425 164832 92 222847 10438.792297017142
+End
+
+Solver 2
+  Equation = "Heat Equation"
+  Variable = "Temperature"
+  Procedure = "HeatSolve" "HeatSolver"
+
+  Linear System Solver = "Iterative"
+  Linear System Iterative Method = "BiCGStab"
+  Linear System Max Iterations = 1000
+  Linear System Convergence Tolerance = 1.0e-08
+  Linear System Abort Not Converged = True
+  Linear System Preconditioning = "ILU0"
+  Linear System Residual Output = 0
+  Nonlinear System Max Iterations = 1
+End
+
+Material 1
+  Name = "Material"
+  Density = 1
+  Heat Conductivity = 1
+End
+
+Body Force 1
+  Name = "BodyForce"
+  Heat Source = 1
+End
+
+Boundary Condition 1
+  Name = "Constraint"
+  Target Boundaries(1) = 1 
+  Temperature = 0
+End
+
+Solver 1 :: Reference Norm = 1.0
+Solver 2 :: Reference Norm = 1.44365965E+02

fem/tests/ElmerGridConvertGmshBinary/runtest.cmake

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+include(test_macros)
+execute_process(COMMAND ${ELMERGRID_BIN} 14 2 binary.msh -autoclean -out mesh)
+RUN_ELMER_TEST()