"DiffEqArray Indexing Tests" from RecursiveArrayTools not included in downstream testing

[ArnoStrouwen]

Not sure if it is intentional that these tests are not included:
https://github.com/SciML/RecursiveArrayTools.jl/blob/0e877e32b89dd13159c11b1ff4eeba4aa3b80302/test/runtests.jl#L63-L64

[ChrisRackauckas]

@AayushSabharwal was this addressed?

[AayushSabharwal]

No, I'll PR to fix it. It looks like we run Core RAT in downstream tests which isn't particularly useful.