CI Fixes

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The Houdini build failure seems to be due to a change in the Houdini API from the latest cache fetch @jmlait. We can still get this in as is to fix all of the other CI failures.

In file included from /Users/runner/work/openvdb/openvdb/openvdb_houdini/openvdb_houdini/GEO_VDBTranslator.cc:9:
In file included from /Users/runner/houdini_install/hou/Frameworks/Houdini.framework/Versions/20.0/Resources/toolkit/include/GU/GU_PrimVDB.h:16:
In file included from /Users/runner/houdini_install/hou/Frameworks/Houdini.framework/Versions/20.0/Resources/toolkit/include/GEO/GEO_PrimVDB.h:15:
In file included from /Users/runner/houdini_install/hou/Frameworks/Houdini.framework/Versions/20.0/Resources/toolkit/include/GEO/GEO_Primitive.h:24:
In file included from /Users/runner/houdini_install/hou/Frameworks/Houdini.framework/Versions/20.0/Resources/toolkit/include/GA/GA_Primitive.h:19:
In file included from /Users/runner/houdini_install/hou/Frameworks/Houdini.framework/Versions/20.0/Resources/toolkit/include/GA/GA_Detail.h:17:
In file included from /Users/runner/houdini_install/hou/Frameworks/Houdini.framework/Versions/20.0/Resources/toolkit/include/GA/GA_ATITopology.h:21:
In file included from /Users/runner/houdini_install/hou/Frameworks/Houdini.framework/Versions/20.0/Resources/toolkit/include/GA/GA_PageArray.h:23:
/Users/runner/houdini_install/hou/Frameworks/Houdini.framework/Versions/20.0/Resources/toolkit/include/UT/UT_FixedVector.h:133:60: error: no member named 'vec_' in 'UT_FixedVector<T, D>'; did you mean 'vec'?
  133 |         return UT::FA::IsUniformZero< T, tuple_size >{}( a.vec_ );
      |                                                            ^
/Users/runner/houdini_install/hou/Frameworks/Houdini.framework/Versions/20.0/Resources/toolkit/include/UT/UT_FixedVector.h:107:7: note: 'vec' declared here
  107 |     T vec[ D ];