[T] Rewritten GMSH2OGS_Extractoundary snakemake test to pytest.

Applications/Utils/GMSH2OGS_ExtractBoundary.smk

Applications/Utils/GMSH2OGS_ExtractBoundary_MeshByGmsh4.smk

Applications/Utils/Tests.cmake

Tests/Data/Utils/GMSH2OGS/A2-gmsh.msh

Tests/Data/Utils/GMSH2OGS/A2-gmsh4.msh

Tests/Data/Utils/GMSH2OGS/A2.vtu

Tests/Data/Utils/GMSH2OGS/A2_0.vtu

Tests/Data/Utils/GMSH2OGS/A2_1.vtu

Tests/Data/Utils/GMSH2OGS/A2_2.vtu

Tests/Data/Utils/GMSH2OGS/A2_3.vtu

Tests/Data/Utils/GMSH2OGS/A2_4.vtu

Tests/Data/Utils/GMSH2OGS/A2_5.vtu

Tests/Data/Utils/GMSH2OGS/A2_6.vtu

Tests/Data/Utils/GMSH2OGS/A2_7.vtu

Tests/Data/Utils/GMSH2OGS/test_gmsh2ogs_extract_boundary.py