python GPU IO Bindings for NVIDIA (#25776)
### Description
<!-- Describe your changes. -->
1. A Small change to use the shared allocator in Python binding.
2. Remove the FP64 support from the EP.
### 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. -->
The Python GPU IO binding is necessary for performance. The change will
enable the shared allocator for GPU allocation.
The FP64 was using the FP32 inference—aligned WRT TRT RTX support.
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Co-authored-by: Gaurav Garg <gaugarg@nvidia.com>
