[clang] [polly] [llvm] [polly][ScheduleOptimizer] Fix long compile time(hang) reported in polly (PR #75141)

[Eli Friedman via llvm-commits]

efriedma-quic wrote:

Pushed revert.

@kartcq please fix the test so it either doesn't depend on DEBUG output, or uses `REQUIRES: asserts`.

https://github.com/llvm/llvm-project/pull/75141