Adding automation to generate hip tag

[ammallya]

Motivation

This PR adds automation for tagging rocm-systems whenever it is bumped to preserve how HIP was tagged before the move to rocm-systems.

Technical Details

• Added a Python script (hip_tagging_helper.py) to:
  • Detect if the rocm-systems submodule SHA changed between two commits.
  • Read the ROCm version from version.json in the repo root.
  • Generate a patch tag in the format hip-version_<major>.<minor>.<YYYYDDD0>.
  • Tag the new rocm-systems commit using the GitHub API.
• Updated workflow to trigger on push to the main branch.

Test Plan

• Tested on fork by mock running the workflow.
• https://github.com/ammallya/TheRock/actions/runs/21964757215 -no change in rocm-systems run
• https://github.com/ammallya/TheRock/actions/runs/21964921804 -successful run, tag-https://github.com/ammallya/rocm-systems/releases/tag/hip-version_7.12.60430

Test Result

• Submodule SHA change detected correctly.
• Patch tag generated in the correct format.
• Tag successfully created on rocm-systems commit.
• Script exits cleanly if no submodule change occurs.

Submission Checklist

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