Add tests for manipulating GPU data from Python using nanobind with DLPack

[jzaia18]

DO NOT MERGE

This branch contains test code for manipulating GPU tensors from Python using nanobind with DLPack. It is not meant to be directly integrated with lightning, just to illustrate the usage of nanobind for manipulating GPU data.

[github-actions]

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Please edit .github/CHANGELOG.md with:

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 27.48%. Comparing base (4ead951) to head (8e3a0cb).

❗ There is a different number of reports uploaded between BASE (4ead951) and HEAD (8e3a0cb). Click for more details.

HEAD has 4 uploads less than BASE

Flag	BASE (4ead951)	HEAD (8e3a0cb)
unit_tests	8	4

Additional details and impacted files

@@                  Coverage Diff                  @@
##           feature/nanobind    #1178       +/-   ##
=====================================================
- Coverage             95.71%   27.48%   -68.24%     
=====================================================
  Files                   183       28      -155     
  Lines                 29356     2718    -26638     
=====================================================
- Hits                  28098      747    -27351     
- Misses                 1258     1971      +713     

Flag	Coverage Δ
unit_tests	27.48% <ø> (-68.24%)	⬇️

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