run tests with runtime debug flags

[lrvideckis]

-D_GLIBCXX_DEBUG -D_GLIBCXX_DEBUG_PEDANTIC -D_GLIBCXX_SANITIZE_VECTOR -D_GLIBCXX_ASSERTIONS -D_FORTIFY_SOURCE=2 -fsanitize=address -fsanitize=undefined -fno-sanitize-recover=all -fstack-protector

https://github.com/kth-competitive-programming/kactl/blob/main/doc/scripts/run-all.sh#L16

[simonlindholm]

There's a trade-off here, where debug flags allow you fewer iterations of the stress tests in the same duration of time. I think generally if ASAN finds something it will find it early, not on the millionth iteration. Could be nice to have both options, with some flag passed in to each test that it could use to determine the number of iterations to run.