Preserve container type in zero(VectorOfArray) via rewrap

`[zero(u) for u in VA.u]` always produces a plain `Vector`, even when
`VA.u` is a `StructVector` (from StructArrays.jl). The constructor
then fails with `MethodError: Cannot convert Vector{SVector{1,Float64}}
to StructVector{...}` because the type parameter `A` is locked to the
original container type.

Use the existing `rewrap(parent, u)` mechanism (already used by
broadcast) to convert the comprehension result back to the original
container type. The `StructArrays` extension defines
`rewrap(::StructArray, u) = StructArray(u)`, and the fallback is
`convert(typeof(parent), u)`.

Fixes OrdinaryDiffEq.jl v7 CI failures in OrdinaryDiffEqLowStorageRK
and OrdinaryDiffEqSSPRK "VectorOfArray/StructArray compatibility" tests.

Co-Authored-By: Chris Rackauckas <accounts@chrisrackauckas.com>
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: ChrisRackauckas

src/vector_of_array.jl

@@ -945,7 +945,7 @@ end
 
 function Base.zero(VA::AbstractVectorOfArray)
     T = typeof(VA)
-    u_zero = [zero(u) for u in VA.u]
+    u_zero = rewrap(VA.u, [zero(u) for u in VA.u])
     fields = [fname == :u ? u_zero : _copyfield(VA, fname) for fname in fieldnames(T)]
     return T(fields...)
 end