Cleanup groupby to use host_span, device_span, device_uvector

[karthikeyann]

addresses part of #7287

• replaced std::vector const& with host_span<const>
• replaced rmm::device_[u]vector const& with device_span<const>
• replaced rmm::device_vector with rmm::device_uvector

[codecov]

Codecov Report

Merging #7698 (06d27f8) into branch-0.19 (f1f1d0f) will increase coverage by 0.37%.
The diff coverage is 60.00%.

❗ Current head 06d27f8 differs from pull request most recent head 7bf0331. Consider uploading reports for the commit 7bf0331 to get more accurate results

@@               Coverage Diff               @@
##           branch-0.19    #7698      +/-   ##
===============================================
+ Coverage        82.12%   82.49%   +0.37%     
===============================================
  Files              101      101              
  Lines            17088    17458     +370     
===============================================
+ Hits             14033    14402     +369     
- Misses            3055     3056       +1     

Impacted Files	Coverage Δ
python/cudf/cudf/core/column/lists.py	87.68% <55.55%> (-1.92%)	⬇️
python/cudf/cudf/utils/dtypes.py	89.88% <100.00%> (ø)
python/cudf/cudf/utils/gpu_utils.py	53.65% <0.00%> (-4.88%)	⬇️
python/cudf/cudf/core/abc.py	87.23% <0.00%> (-1.14%)	⬇️
python/cudf/cudf/io/feather.py	100.00% <0.00%> (ø)
python/cudf/cudf/comm/serialize.py	0.00% <0.00%> (ø)
python/cudf/cudf/_fuzz_testing/io.py	0.00% <0.00%> (ø)
python/cudf/cudf/core/column/struct.py	100.00% <0.00%> (ø)
python/dask_cudf/dask_cudf/_version.py	0.00% <0.00%> (ø)
python/cudf/cudf/_fuzz_testing/fuzzer.py	0.00% <0.00%> (ø)
... and 42 more

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[karthikeyann]

rerun tests

[harrism]

Looks good. Just one suggestion to avoid ITM.

[ttnghia]

Just one more comment: Please add more description for the PR.

[karthikeyann]

@gpucibot merge