feat(analytical): Add the Graph.consolidate_columns() interface in Python client

[sighingnow]

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[andydiwenzhu]

LGTM! Thanks a lot!

[codecov-commenter]

Codecov Report

Merging #3060 (5080a01) into main (422d0b6) will decrease coverage by 6.90%.
Report is 1 commits behind head on main.
The diff coverage is 35.71%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3060      +/-   ##
==========================================
- Coverage   42.67%   35.78%   -6.90%     
==========================================
  Files         100      100              
  Lines       10713    10787      +74     
==========================================
- Hits         4572     3860     -712     
- Misses       6141     6927     +786     

Files Changed	Coverage Δ
python/graphscope/tests/unittest/test_graph.py	0.00% <0.00%> (ø)
python/graphscope/tests/conftest.py	47.61% <28.57%> (-0.67%)	⬇️
python/graphscope/framework/dag_utils.py	37.38% <45.45%> (-7.14%)	⬇️
python/graphscope/framework/utils.py	47.05% <55.55%> (+3.99%)	⬆️
python/graphscope/framework/graph.py	62.31% <59.09%> (-7.42%)	⬇️

... and 25 files with indirect coverage changes

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