Fix setter properties in Data

[rusty1s]

No description provided.

[codecov]

Codecov Report

Merging #4686 (8e328b3) into master (1bafcc4) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #4686   +/-   ##
=======================================
  Coverage   82.88%   82.88%           
=======================================
  Files         318      318           
  Lines       16820    16820           
=======================================
  Hits        13942    13942           
  Misses       2878     2878           

Impacted Files	Coverage Δ
torch_geometric/data/data.py	90.78% <100.00%> (ø)

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