onnxruntime

45457323 - MemcpyFromHost and MemcpyToHost support for plugin EPs (#26088)

MemcpyFromHost and MemcpyToHost support for plugin EPs (#26088) ### Description <!-- Describe your changes. --> Add support for `MemcpyFromHost` and `MemcpyToHost` ops with plugin EPs. - Add CPU EP fallback kernels for the memcpy ops. These are generic implementations using a data transfer manager. - Update `SessionState::PopulateKernelCreateInfo()` to fall back to CPU memcpy kernels if a node's assigned provider doesn't have them. - Update `MemcpyTransformer` to determine whether providers are CPU-based or compatible with other providers by looking at the device type instead of matching against a hardcoded list of provider types. This accommodates plugin EPs, where the provider type can't be hardcoded. ### Motivation and Context <!-- - Why is this change required? What problem does it solve? - If it fixes an open issue, please link to the issue here. --> Allow plugin EPs to work with models where memcpy ops are required (i.e., models where connected nodes are not fully assigned to the plugin EP).