Pip cannot find package for Nvidia DGX Spark (arm linux)

### Describe the issue

Trying to setup ai libraries for training, running into issue with pip install onnxruntime-gpu==1.21 Could not find a version that satisfies the requirement. Likely because its an arm linux platform. Can you build and release these versions?

### To reproduce

Try and install onnxruntime-gpu on DGX spark

### Urgency

Low

### Platform

Linux

### OS Version

Ubuntu 24.04

### ONNX Runtime Installation

Released Package

### ONNX Runtime Version or Commit ID

1.21

### ONNX Runtime API

Python

### Architecture

ARM64

### Execution Provider

Other / Unknown

### Execution Provider Library Version

_No response_