NeighborLoader: Optionally use argument data without to_csc

[ZenoTan]

No description provided.

[codecov]

Codecov Report

Merging #4620 (0f14794) into master (6f120ff) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #4620   +/-   ##
=======================================
  Coverage   82.88%   82.88%           
=======================================
  Files         316      316           
  Lines       16674    16675    +1     
=======================================
+ Hits        13820    13821    +1     
  Misses       2854     2854           

Impacted Files	Coverage Δ
torch_geometric/data/lightning_datamodule.py	26.08% <ø> (ø)
torch_geometric/loader/link_neighbor_loader.py	93.12% <ø> (ø)
torch_geometric/loader/neighbor_loader.py	91.83% <100.00%> (ø)
torch_geometric/loader/utils.py	77.77% <100.00%> (+0.24%)	⬆️

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