"with tail calls step-out" test is flaky

[alt-romes]

It seems that the test fails quite regularly, but not always.

We need to investigate why it fails and either remove it from the testsuite or fix it.

[alt-romes]

An example: https://github.com/well-typed/haskell-debugger/actions/runs/19437305623/job/55613514218?pr=125

[alt-romes]

Another example: https://github.com/well-typed/haskell-debugger/actions/runs/19469418016/job/55713628671