[workflow] Test OpenGL using GitHub actions

[yuanming-hu]

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[codecov]

Codecov Report

Merging #2014 (978d32e) into master (380f116) will increase coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2014      +/-   ##
==========================================
+ Coverage   43.54%   43.56%   +0.02%     
==========================================
  Files          45       45              
  Lines        6267     6264       -3     
  Branches     1110     1109       -1     
==========================================
  Hits         2729     2729              
+ Misses       3366     3363       -3     
  Partials      172      172              

Impacted Files	Coverage Δ
python/taichi/diagnose.py	0.00% <0.00%> (ø)
python/taichi/lang/__init__.py	40.57% <0.00%> (+0.16%)	⬆️
python/taichi/misc/util.py	20.54% <0.00%> (+0.21%)	⬆️
python/taichi/lang/snode.py	68.10% <0.00%> (+2.27%)	⬆️

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[yuanming-hu]

@archibate Everything is now set up on zhen :-) Please fix #1931 before merging this PR. The buildbot fails because of the following error:

=========================== short test summary info ============================
FAILED tests/python/test_bit_operations.py::test_bit_shr[opengl] - RuntimeErr...
======= 1 failed, 848 passed, 113 skipped, 2 rerun in 844.81s (0:14:04) ========

[archibate]

Let's exclude opengl from test_bit_shr for fix #1931 then, it's not trivial to introduce unsigned types to OpenGL and I believe most people will just make use of bit_sar.

[yuanming-hu]

Let's exclude opengl from test_bit_shr for fix #1931 then, it's not trivial to introduce unsigned types to OpenGL and I believe most people will just make use of bit_sar.

Any insight on why unsigned types for OpenGL is more non-trivial than the signed ones? I think adding unsigned types there would be very meaningful.