Changes on property applications

[lidongze0629]

What do these changes do?

• Remove SSSP and BFS on property graph.
• Rename cdlp -> lpa, lpa -> lpa_u2i, and set cdlp as the default implementation of LPA
• make the projection step implicit in Python.
• reserve specific apps defined on property graph, e.g., u-i lpa;
• test and update doc of analytical engine

Related issue number

Fixes #1212
Links #1121
Links #1206
Links #1150

[codecov-commenter]

Codecov Report

Merging #1228 (9338ccc) into main (0c60e6d) will decrease coverage by 0.83%.
The diff coverage is 84.00%.

@@            Coverage Diff             @@
##             main    #1228      +/-   ##
==========================================
- Coverage   73.01%   72.17%   -0.84%     
==========================================
  Files          89       88       -1     
  Lines        9474     9397      -77     
==========================================
- Hits         6917     6782     -135     
- Misses       2557     2615      +58     

Impacted Files	Coverage Δ
python/graphscope/analytical/app/sssp.py	100.00% <ø> (ø)
python/graphscope/framework/app.py	90.10% <0.00%> (-1.05%)	⬇️
python/graphscope/framework/context.py	65.13% <ø> (-0.92%)	⬇️
python/graphscope/tests/unittest/test_udf_app.py	38.75% <15.38%> (-0.40%)	⬇️
python/graphscope/tests/unittest/test_session.py	64.21% <25.00%> (+0.66%)	⬆️
python/graphscope/tests/unittest/test_context.py	81.03% <83.33%> (-5.98%)	⬇️
python/graphscope/analytical/app/__init__.py	100.00% <100.00%> (ø)
python/graphscope/analytical/app/bfs.py	100.00% <100.00%> (+9.09%)	⬆️
python/graphscope/analytical/app/lpa.py	100.00% <100.00%> (ø)
python/graphscope/tests/conftest.py	84.21% <100.00%> (-0.24%)	⬇️
... and 11 more

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[siyuan0322]

Overall LGTM.