Partitioning and reading non-IP field data

Merged wenqing requested to merge wenqing/ogs:update_partmesh into master

as titled.

Note: bulk_element_ids in the field data is not handled in this MR.

  1. Feature description was added to the changelog
  2. Tests covering your feature were added?
  3. Any new feature or behavior change was documented?
Edited by wenqing

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