[WIP][QNN EP] Simplify QnnBackendManager resource management #23451
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edgchen1
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Description
Simplify
QnnBackendManagerresource management by using RAII to manage freeing of the QNN resources.The QNN handles are
void*so we can usestd::unique_ptrs with custom deleters to manage them.Motivation and Context
Free resources more reliably and simplify the code.