torch.sparse_csr support in MessagePassing

[rusty1s]

No description provided.

[codecov]

Codecov Report

Merging #6947 (6914fb3) into master (d4b1297) will increase coverage by 0.00%.
The diff coverage is 93.33%.

❗ Current head 6914fb3 differs from pull request most recent head 6b61385. Consider uploading reports for the commit 6b61385 to get more accurate results

@@           Coverage Diff           @@
##           master    #6947   +/-   ##
=======================================
  Coverage   91.49%   91.49%           
=======================================
  Files         429      429           
  Lines       23326    23340   +14     
=======================================
+ Hits        21341    21354   +13     
- Misses       1985     1986    +1     

Impacted Files	Coverage Δ
torch_geometric/utils/spmm.py	70.83% <ø> (ø)
torch_geometric/nn/conv/message_passing.py	98.66% <92.30%> (-0.24%)	⬇️
torch_geometric/utils/sparse.py	92.00% <100.00%> (+0.33%)	⬆️

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