[Feature Request] Support for Int64 datatype for shape tensor in Expand Op in ORT-QNN EP

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### Describe the feature request

Currently Int64 shape tensor is not handled in Expand Op builder and below error is thrown: [expand_op_builder.cc](https://github.com/microsoft/onnxruntime/blob/main/onnxruntime/core/providers/qnn/builder/opbuilder/expand_op_builder.cc#L126). Support is required to cast and handle this datatype in ORT QNN EP.

### Describe scenario use case

Currently we are getting below error if the input model has Int64 as shape tensor in Expand node.
```
[V:onnxruntime:, qnn_execution_provider.cc:521 onnxruntime::QNNExecutionProvider::GetSupportedNodes] Validation FAILED for 1 nodes in NodeUnit (Expand) :

Operator type: Expand Node name: Expand_1 Node index: 1

REASON : Type not supported.
```

Start in onnxruntime/core/providers/qnn/builder/opbuilder/expand_op_builder.cc at the validation around line 126, where Int64 shape tensors are rejected. Trace how Expand shape tensors are handled in the ORT-QNN execution provider and verify an Expand node with an Int64 shape tensor no longer reports the shown Type not supported error.

Written by the indexing model from the issue text.