Try reenabling Blosc2

Author: franzpoeschel

.github/ci/spack-envs/clang7_nopy_ompi_h5_ad2/spack.yaml

@@ -12,7 +12,9 @@ spack:
 
   packages:
     adios2:
-      variants: ~zfp ~sz ~png ~dataman ~python ~fortran ~ssc ~shared ~bzip2 ~blosc2
+      variants: ~zfp ~sz ~png ~dataman ~python ~fortran ~ssc ~shared ~bzip2
+    blosc2:
+      variants: ~avx2
     cmake:
       externals:
       - spec: cmake@3.23.0

.github/ci/spack-envs/clang7_nopy_ompi_h5_ad2_libcpp/spack.yaml

@@ -12,7 +12,9 @@ spack:
 
   packages:
     adios2:
-      variants: ~zfp ~sz ~png ~dataman ~python ~fortran ~ssc ~shared ~bzip2 ~mgard ~blosc2
+      variants: ~zfp ~sz ~png ~dataman ~python ~fortran ~ssc ~shared ~bzip2 ~mgard
+    blosc2:
+      variants: ~avx2
     cmake:
       externals:
       - spec: cmake@3.23.0