Bring back mars support, re-enable mars test in CI, and fixes several related issues.

[sighingnow]

What do these changes do?

The mars's web session is expose to the client, the default session won't work as we use the fixed backend for services when launching mars's scheduler.

The mars test is disable by default on CI, and can be enabled by export a environment variable WITH_MARS. The test case has been manually validated.

Related issue number

N/A

[codecov-commenter]

Codecov Report

Merging #1246 (2a331af) into main (819b970) will decrease coverage by 0.84%.
The diff coverage is 50.00%.

@@            Coverage Diff             @@
##             main    #1246      +/-   ##
==========================================
- Coverage   73.54%   72.69%   -0.85%     
==========================================
  Files          88       89       +1     
  Lines        9412     9453      +41     
==========================================
- Hits         6922     6872      -50     
- Misses       2490     2581      +91     

Impacted Files	Coverage Δ
...n/graphscope/deploy/kubernetes/resource_builder.py	56.54% <40.00%> (-0.64%)	⬇️
python/graphscope/deploy/kubernetes/utils.py	69.04% <42.85%> (-0.52%)	⬇️
python/graphscope/config.py	100.00% <100.00%> (ø)
...thon/graphscope/tests/kubernetes/test_with_mars.py	44.82% <100.00%> (ø)
python/graphscope/analytical/app/java_app.py	24.00% <0.00%> (-45.50%)	⬇️
python/graphscope/tests/unittest/test_java_app.py	55.00% <0.00%> (-45.00%)	⬇️
python/graphscope/framework/app.py	90.10% <0.00%> (-0.53%)	⬇️
...ython/graphscope/tests/unittest/test_serailaize.py	100.00% <0.00%> (ø)
python/graphscope/framework/graph.py	84.53% <0.00%> (+4.94%)	⬆️
...on/graphscope/tests/kubernetes/test_demo_script.py	91.74% <0.00%> (+10.83%)	⬆️

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