hdf5: do not find via the config file

ThirdParty/hdf5/CMakeLists.txt

+# The targets exported by HDF5 in its config mode do not work with the module
+# system as-is.
+set(HDF5_NO_FIND_PACKAGE_CONFIG_FILE ON)
+
 vtk_module_third_party(HDF5
   LIBRARIES vtkhdf5_hl vtkhdf5
   INCLUDE_DIRS