CI for testing through macos seems flaky

[anutosh491]

The CI yesterday was passing at some attempts and failing otherwise. At a couple of instances I saw it is also running infinitely (https://github.com/lcompilers/lpython/actions/runs/7438892349/job/20243305980)

[certik]

Also discussed at https://lfortran.zulipchat.com/#narrow/stream/197339-general/topic/CI.20for.20testing.20through.20macos.20seems.20flaky.20for.20Lpython.

[certik]

Debugging the issue at #2502.

[certik]

This is now "fixed" by removing the tests. See #2520 for the proper fix.