Reset data_list cache when accessing dataset.data

[rusty1s]

No description provided.

[codecov]

Codecov Report

Merging #6685 (af03f51) into master (d6b3ac3) will decrease coverage by 1.52%.
The diff coverage is 90.90%.

@@            Coverage Diff             @@
##           master    #6685      +/-   ##
==========================================
- Coverage   90.48%   88.97%   -1.52%     
==========================================
  Files         423      423              
  Lines       22983    22957      -26     
==========================================
- Hits        20796    20425     -371     
- Misses       2187     2532     +345     

Impacted Files	Coverage Δ
torch_geometric/data/in_memory_dataset.py	96.55% <90.90%> (-0.82%)	⬇️
torch_geometric/nn/models/dimenet_utils.py	0.00% <0.00%> (-75.52%)	⬇️
torch_geometric/nn/models/dimenet.py	17.66% <0.00%> (-49.78%)	⬇️
torch_geometric/visualization/graph.py	68.25% <0.00%> (-26.99%)	⬇️
torch_geometric/nn/conv/utils/typing.py	83.75% <0.00%> (-15.00%)	⬇️
torch_geometric/nn/pool/asap.py	91.89% <0.00%> (-8.11%)	⬇️
torch_geometric/resolver.py	82.75% <0.00%> (-6.90%)	⬇️
torch_geometric/nn/dense/linear.py	88.97% <0.00%> (-5.92%)	⬇️
torch_geometric/nn/models/attentive_fp.py	95.83% <0.00%> (-4.17%)	⬇️
torch_geometric/sampler/neighbor_sampler.py	91.56% <0.00%> (-3.22%)	⬇️
... and 30 more

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