Merge lightning.gpu and lightning.tensor test CIs and add control by a label

[AmintorDusko]

Context: Merge lightning.gpu and lightning.tensor test CIs and add control by a label

Description of the Change: Merge lightning.gpu and lightning.tensor GPU tests in single Python and C++ CIs controlled by the ci:use-gpu-runner label.

Benefits: Efficient CIs, faster queue, and code reduction.

Possible Drawbacks:

[sc-73818]

Related GitHub Issues:

[github-actions]

Hello. You may have forgotten to update the changelog!
Please edit .github/CHANGELOG.md with:

• A one-to-two sentence description of the change. You may include a small working example for new features.
• A link back to this PR.
• Your name (or GitHub username) in the contributors section.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.32%. Comparing base (eb709d5) to head (0a2ca07).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #911      +/-   ##
==========================================
+ Coverage   96.22%   96.32%   +0.10%     
==========================================
  Files         214       94     -120     
  Lines       29804    11793   -18011     
==========================================
- Hits        28679    11360   -17319     
+ Misses       1125      433     -692     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[AmintorDusko]

Last commit (1b264c4) shows an example of GPU runners not being activated without the ci:use-gpu-runner label.

[multiphaseCFD]

Nice work @AmintorDusko . Just one question: is there a plan to move lightning.kokkos-cuda tests to tests_gpu workflows?

[AmintorDusko]

Nice work @AmintorDusko . Just one question: is there a plan to move lightning.kokkos-cuda tests to tests_gpu workflows?

Maybe in the future. This one requires more time.

[multiphaseCFD]

Looks good to me! Thanks @AmintorDusko for the nice work.

[maliasadi]

Thanks @AmintorDusko!

[AmintorDusko]

Hi @maliasadi, I updated the workflows as discussed offline and following your suggestions.

[maliasadi]

Thanks @AmintorDusko! Just a few questions to ensure the compatibility of the support with pennylane-plugin-matrix and on push-to-master.. happy to approve soon 🙂

[maliasadi]

Thanks @AmintorDusko! LGTM 🎉