[QNN EP] Add QuickGELU operator support for QNN provider (#27034)
### Description
Add support for the QuickGELU operator in the QNN provider:
- Implement QuickGeluOpBuilder to handle QuickGELU operations
- Add registration for QuickGELU in op_builder_factory
- Add comprehensive tests for CPU and HTP backends
- Support both float and quantized (QDQ) versions
### Motivation and Context
- QNN doesn't have a direct operator to map QuickGelu so decompose it as
x * sigmoid(alpha * x) for computing the whole model on HTP to improve
inference time.
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Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>