Add requirements for testing

[amd-sriram]

Motivation

The CI script additionally installs expecttest onnxscript before running the test scripts. Moved these packages to requirements_dev.txt.

Addresses comment - #303 (comment)

Test Plan

Install the packages expecttest onnxscript through requirements_dev.txt and check if these packages are installed.

pip install -r requirements_dev.txt
pip list | grep onnxscript
pip list | grep expecttest 

Test the CI.

Test Result

onnxscript                    0.5.4
expecttest                    0.3.0

Run - https://github.com/ROCm/apex/actions/runs/23505553410

Submission Checklist

• Look over the contributing guidelines at https://github.com/ROCm/ROCm/blob/develop/CONTRIBUTING.md#pull-requests.

[jithunnair-amd]

Please also remove the line from

apex/.github/workflows/rocm-ci.yml

Line 145 in eb1f3ae

pip install expecttest onnxscript

[amd-sriram]

@jithunnair-amd I made the requested change and tested in the run - https://github.com/ROCm/apex/actions/runs/23505553410. Could you please review it again and merge it if it is ok. Thanks.