Split the StandardTestData into UnitTestData and DocsTestData

[peterfpeterson]

To help developers locally, this breaks down StandardData into UnitTestData and DocTestData and updates the various targets accordingly. This way people that want to build, for example, AlgorithmsTest don't have to wait for all of the data for doc tests as well. There is a missing dependency of docs-doctests on DocTestData which is added.

This will not affect build servers since they build everything.

There is no associated issue, but this is associated with EWM10160.

To test:

ninja clean && ninja MDAlgorithmsTest && ctest -R MDAlgorithmsTest

should link the appropriate test data and pass.

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I didn't see the self-assign

[thomashampson]

I think this is a sensible change. Since Reece also approved it I will act as gatekeeper.