[QNN EP] Add QNN EP to ARM64X build targets (#23635)
### Description
Currently when we build with --buildasx, only the onnxruntime.dll is
built as ARM64X binary.
This change addresses the above issue by adding
onnxruntime_provider_shared and
onnxruntime_provider_qnn targets to the ARM64X_TARGETS build target
list.
### Motivation and Context
For QNN EP which supports ARM64, --buildasx does not build the EP dll'
such as onnxruntime_provider_shared.dll and onnxruntime_provider_qnn.dll
as ARM64X binary.
