Normalize parent array type

[lkdvos]

This PR brings back a change that was present in older versions of Strided.jl, by normalizing the parent type of StridedView to only include Vector.
This main reason is this TensorOperations.jl PR which introduces some precompilation efforts, reporting a rather large amount of specializations from Strided.
While there is definitely room for adding precompilation in this package as well, to further decrease the burden on TensorOperations itself, this seems like a rather simple change that has a huge impact on the precompilation times: my machine reports ~140 seconds before, but ~40 seconds after.
Alternatively, we could also consider just normalizing the types in TensorOperations itself, but this change seems reasonable to me.

I'm not sure if this constitutes a breaking change though, given that fields are typically considered private I would say it isn't?

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.66%. Comparing base (27b1c09) to head (5025992).

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #15      +/-   ##
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+ Coverage   91.54%   91.66%   +0.12%     
==========================================
  Files           4        4              
  Lines         201      204       +3     
==========================================
+ Hits          184      187       +3     
  Misses         17       17              

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