[Python][Client] Unify the graph level load_from and save to API

[acezen]

This is a prototype implementation of the design of load_from and write_to Python API
related issue: #2836

Use examples:

import graphscope.Graph as Graph
# load from graphar file
g = Graph.load_from("graphar+file:///tmp/ldbc/ldbc_sample.graph.yml")
# load from oss file storage
g = Graph.load_from("graphar+oss://bucket/ldbc/ldbc_sample.graph.yml")

import graphscope
g = graphscope.load_ldbc()

# write to graphar format
g.save_to("/tmp/ldbc/", format="graphar")
# write to oss output
g.save_to("oss://bucket/ldbc", format="graphar")
# write to graphar format with configuration
g.save_to("/tmp/ldbc/", format="graphar", graphar_graph_name="ldbc", 
      graphar_vertex_block_size=1024, graphar_edge_block_size=2048,
      graphar_file_format="orc")

[codecov-commenter]

Codecov Report

Merging #2919 (1ea86b3) into main (a6fd8ba) will decrease coverage by 6.55%.
Report is 1 commits behind head on main.
The diff coverage is 7.84%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2919      +/-   ##
==========================================
- Coverage   41.39%   34.84%   -6.55%     
==========================================
  Files         107      107              
  Lines       11203    11309     +106     
==========================================
- Hits         4637     3941     -696     
- Misses       6566     7368     +802     

Files	Coverage Δ
python/graphscope/__init__.py	82.85% <ø> (-0.48%)	⬇️
python/graphscope/client/session.py	56.31% <ø> (-8.38%)	⬇️
python/graphscope/dataset/ldbc.py	35.29% <ø> (-35.30%)	⬇️
python/graphscope/framework/dag_utils.py	37.38% <100.00%> (-7.17%)	⬇️
python/graphscope/framework/graph_builder.py	87.17% <ø> (+24.67%)	⬆️
python/graphscope/tests/unittest/test_graphar.py	0.00% <0.00%> (ø)
python/graphscope/framework/graph.py	60.10% <12.82%> (-9.15%)	⬇️
python/graphscope/framework/utils.py	39.80% <4.21%> (-4.64%)	⬇️

... and 26 files with indirect coverage changes

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[siyuan0322]

Why remove this line.

[acezen]

fixed

[siyuan0322]

I think it's more clear to pass graphar related parameters in a dict, not messed up with other parameters.

[acezen]

that's our design discuss in issue #2957 , and the parameters are like Session init method's parameter.

[acezen]

this PR is outdated, create a new pull request #3610