ParaViewTestingData-v?.?.?.tar.gz could use better name

We have two data packages produced during releases:

ParaViewTestingData-v5.6.0.tar.gz: contains the content store of ParaView's testing data ParaViewData-v5.6.0.tar.gz: contains the actual test data files named with their original names.

There are probably better names for these two items. I propose

ParaViewTestingContentStore-v5.6.0.tar.gz: for the test content store ParaViewTestingDataFiles-v5.6.0.tar.gz: for the data files that can be loaded directly.

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