Tough test, stress test, recursive test, and parallel test

[zaikunzhang]

These tests intend to verify that the solver works properly under different conditions.

Tough test: whether the solver works properly when the objective / constraint function fails or returns exceptional values randomly. For example
https://github.com/libprima/prima/blob/main/matlab/tests/private/tough.m

Stress test: whether the solver works properly when the problem is exceptionally large (e.g., 500 variables and 5000 constraints). For example
https://github.com/libprima/prima/blob/main/matlab/tests/stress.m

Recursive test: whether the solver works properly when invoked recursively. For example
https://github.com/libprima/prima/blob/main/matlab/tests/recursive.m

Parallel test: whether the solver works properly when invoked in parallel. For example
https://github.com/libprima/prima/blob/main/matlab/tests/parallel.m

N.B.

1. We have to test all platforms (linux, macos, windows and different versions of Python). The behavior may be different when the platform changes.
2. We need to run these tests periodically on randomized data. Success on a particular problem does not mean anything.
3. You will need this: https://github.com/orgs/community/discussions/58716