Seg fault: In hoist vector transfer operation pass

[arun-thmn]

In the Hoist Vector Transfer pass (https://github.com/plaidml/tpp-mlir/blob/main/lib/TPP/Transforms/HoistVectorTransfers.cpp#L167), while trying to erase the old reduction or k loop after removing its dependencies, but it results in seg fault`. Needed to be investigated.

This issue happened as part of the PR: #977