fix memory leak of VolAuxData on host

[SeverinDiederichs]

The volume auxiliary data was allocated as a raw pointer and never freed in InitializeSharedAdePTTransport():

  auto *auxData = new adeptint::VolAuxData[vecgeom::GeoManager::Instance().GetRegisteredVolumesCount()];

This is fixed by using a smart pointer on the host, and the view is cleared when the device is freed.

[SeverinDiederichs]

@codex review

[SeverinDiederichs]

/run-test

[phsft-bot]

Can one of the admins verify this patch?

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. Keep them coming!

Reviewed commit: 1d84cde9e9

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[agheata]

The ownership and teardown sequence is coherent: the transport owns the host array, the GPU worker is joined before device cleanup, the constant device pointer is cleared, and the singleton’s non-owning views are reset.