Add a script to run tests in `pytest test_core.py` separately

[zhanglx13]

Description

This script runs each function in test_core.py separately and

• It can catch the core dump error and continue to run the next test function
• It writes pytest output for each function in a separate file
• It writes the summary, which is more simplified than pytest summary, into another file

Usage

1. copy this script in upstream triton dir. Any location works since it can find its way to the python dir.
2. Run it: ./check_test_core.sh

The summary and pytest output for each test function are written to /python/test_output/.

Sample output

Running test_core.py on run_test_core@35edd6a65
test_empty_kernel:                           12 passed
test_bin_op:                                 720 passed, 38 warnings
test_addptr:                                 24 passed
test_floordiv:                               32 passed
test_unsigned_name_mangling:                 1 passed
test_bitwise_op:                             1587 passed
...