Remove deprecated doc attribute

[cdce8p]

Description

Remove the deprecated doc attribute in favor of just doc_node.
Refs #1868
Refs #2148

[codecov]

Codecov Report

Merging #2154 (7633f9c) into main (08ed413) will decrease coverage by 0.03%.
The diff coverage is 100.00%.

❗ Current head 7633f9c differs from pull request most recent head 564bbc6. Consider uploading reports for the commit 564bbc6 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2154      +/-   ##
==========================================
- Coverage   92.57%   92.55%   -0.03%     
==========================================
  Files          94       94              
  Lines       10819    10796      -23     
==========================================
- Hits        10016     9992      -24     
- Misses        803      804       +1     

Flag	Coverage Δ
linux	92.31% <100.00%> (-0.03%)	⬇️
pypy	87.50% <100.00%> (-0.01%)	⬇️
windows	92.14% <100.00%> (-0.03%)	⬇️

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Impacted Files	Coverage Δ
astroid/nodes/scoped_nodes/scoped_nodes.py	91.93% <100.00%> (-0.23%)	⬇️

... and 2 files with indirect coverage changes