GraphStore: Refactor and remove SparseTensor dependency

[rusty1s]

No description provided.

[codecov]

Codecov Report

Merging #5517 (d7360c3) into master (31d8687) will decrease coverage by 2.12%.
The diff coverage is 69.68%.

@@            Coverage Diff             @@
##           master    #5517      +/-   ##
==========================================
- Coverage   86.50%   84.38%   -2.13%     
==========================================
  Files         381      381              
  Lines       21303    21259      -44     
==========================================
- Hits        18429    17939     -490     
- Misses       2874     3320     +446     

Impacted Files	Coverage Δ
torch_geometric/data/hetero_data.py	89.80% <54.54%> (-4.78%)	⬇️
torch_geometric/data/data.py	88.96% <56.00%> (-4.06%)	⬇️
torch_geometric/data/graph_store.py	90.32% <87.83%> (-2.58%)	⬇️
torch_geometric/testing/graph_store.py	94.73% <88.88%> (-5.27%)	⬇️
torch_geometric/nn/models/dimenet_utils.py	0.00% <0.00%> (-75.52%)	⬇️
torch_geometric/nn/models/dimenet.py	14.90% <0.00%> (-52.76%)	⬇️
torch_geometric/visualization/graph.py	68.25% <0.00%> (-26.99%)	⬇️
torch_geometric/profile/profile.py	33.33% <0.00%> (-25.39%)	⬇️
torch_geometric/nn/conv/utils/typing.py	83.75% <0.00%> (-15.00%)	⬇️
torch_geometric/nn/pool/asap.py	92.10% <0.00%> (-7.90%)	⬇️
... and 34 more

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more