Disable tests known to fail on AArch64:

  https://gitlab.dune-project.org/core/dune-common/-/issues/262
  https://issues.guix.gnu.org/62842

--- a/dune/common/test/eigenvaluestest.cc
+++ b/dune/common/test/eigenvaluestest.cc
@@ -340,20 +340,15 @@
   testSymmetricFieldMatrix<double,200>();
   testSymmetricFieldMatrix<float,4>();
   testSymmetricFieldMatrix<float,200>();
-  testSymmetricFieldMatrix<long double,4>();
-  testSymmetricFieldMatrix<long double,200>();
 #endif // HAVE_LAPACK
 
   testSymmetricFieldMatrix<double,2>();
   testSymmetricFieldMatrix<double,3>();
   testSymmetricFieldMatrix<float,2>();
   testSymmetricFieldMatrix<float,3>();
-  testSymmetricFieldMatrix<long double,2>();
-  testSymmetricFieldMatrix<long double,3>();
 
   checkMultiplicity<double>();
   checkMultiplicity<float>();
-  checkMultiplicity<long double>();
 
   return 0;
 }
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