Fix: VirtualNode mistakenly treats node features as edge features

[rusty1s]

Fixes #5818

[codecov]

Codecov Report

Merging #5819 (d3b278a) into master (344b143) will decrease coverage by 1.88%.
The diff coverage is 80.00%.

@@            Coverage Diff             @@
##           master    #5819      +/-   ##
==========================================
- Coverage   85.85%   83.97%   -1.89%     
==========================================
  Files         349      349              
  Lines       19439    19439              
==========================================
- Hits        16689    16323     -366     
- Misses       2750     3116     +366     

Impacted Files	Coverage Δ
torch_geometric/transforms/virtual_node.py	93.47% <80.00%> (-6.53%)	⬇️
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/profile/profile.py	37.89% <0.00%> (-26.32%)	⬇️
torch_geometric/nn/conv/utils/typing.py	81.25% <0.00%> (-17.50%)	⬇️
torch_geometric/nn/pool/asap.py	92.10% <0.00%> (-7.90%)	⬇️
torch_geometric/nn/inits.py	67.85% <0.00%> (-7.15%)	⬇️
torch_geometric/transforms/add_self_loops.py	94.44% <0.00%> (-5.56%)	⬇️
torch_geometric/nn/resolver.py	88.88% <0.00%> (-5.56%)	⬇️
... and 10 more

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