Accept a filetype arguments in loader for reading orc/parquet using prefix

[sighingnow]

What do these changes do?

See changes in loader.py.

Related issue number

Fixes #2328
Requires v6d-io/v6d#1104

[codecov-commenter]

Codecov Report

Merging #2332 (fd38523) into main (11c1715) will decrease coverage by 32.55%.
The diff coverage is 100.00%.

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #2332       +/-   ##
===========================================
- Coverage   72.85%   40.29%   -32.56%     
===========================================
  Files          89       89               
  Lines        9956     9954        -2     
===========================================
- Hits         7253     4011     -3242     
- Misses       2703     5943     +3240     

Impacted Files	Coverage Δ
python/graphscope/framework/loader.py	64.80% <100.00%> (-17.09%)	⬇️
python/graphscope/tests/unittest/test_java_app.py	0.00% <0.00%> (-100.00%)	⬇️
...ython/graphscope/tests/unittest/test_cython_ast.py	0.00% <0.00%> (-100.00%)	⬇️
...ython/graphscope/tests/unittest/test_serailaize.py	0.00% <0.00%> (-100.00%)	⬇️
python/graphscope/analytical/udf/patch.py	3.47% <0.00%> (-96.53%)	⬇️
python/graphscope/tests/unittest/test_lazy.py	0.00% <0.00%> (-96.19%)	⬇️
python/graphscope/tests/unittest/test_app.py	0.00% <0.00%> (-96.11%)	⬇️
...thon/graphscope/tests/unittest/test_scalability.py	0.00% <0.00%> (-96.00%)	⬇️
...hon/graphscope/tests/unittest/test_create_graph.py	0.00% <0.00%> (-92.73%)	⬇️
python/graphscope/tests/unittest/test_graph.py	0.00% <0.00%> (-85.47%)	⬇️
... and 39 more

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