Loosen the VOF unit test tolerance

[marchdf]

On my laptop, this:

[+]  z3fyz4z  nalu-wind@master%[email protected] cxxflags=-D_LIBCPP_ENABLE_CXX17_REMOVED_UNARY_BINARY_FUNCTION ~asan~boost~catalyst~cdash_submit~cuda~fftw~fsi~gpu-aware-mpi+hypre~ipo~ninja~openfast+pic~rocm~shared~tests~tioga+trilinos-solvers~umpire+unit-tests~wind-utils abs_tol=1e-15 build_system=cmake build_type=Release ctest_args='-R unit' dev_path=/Users/mhenryde/exawind/exawind-manager/environments/nalu-wind-dev/nalu-wind generator=make reference_golds=default rel_tol=1e-12 arch=darwin-ventura-m1

leads to a unit test failure in VOFKernelHex8Mesh.NGP_adv_diff_edge_tpetra

  RUN      ] VOFKernelHex8Mesh.NGP_adv_diff_edge_tpetra
/Users/mhenryde/exawind/exawind-manager/environments/nalu-wind-dev/nalu-wind/unit_tests/UnitTestTpetraHelperObjects.h:130: Failure
The difference between vals[offset] and constRowView.value(j) is 1.4210854715202004e-14, which exceeds tol, where
vals[offset] evaluates to -83.128243716220496,
constRowView.value(j) evaluates to -83.12824371622051, and
tol evaluates to 1e-14.
i: 1, j: 2
/Users/mhenryde/exawind/exawind-manager/environments/nalu-wind-dev/nalu-wind/unit_tests/UnitTestTpetraHelperObjects.h:141: Failure
The difference between rhs[i] and localRhs(i, 0) is 2.8421709430404007e-14, which exceeds tol, where
rhs[i] evaluates to 166.25648743244099,
localRhs(i, 0) evaluates to 166.25648743244102, and
tol evaluates to 1e-14.
i: 1

I am attributing this to some compiler differences since the unit tests don't fail on ellis. I would still like them to pass on my machine so I am loosening the tolerance to 1e-13 for this test.