macos,test: test/agents/test-zmq-blocked-loop.mjs is flaky

[santigimeno]

Seen: https://github.com/nodesource/nsolid/actions/runs/8455287137/job/23162405902?pr=108#step:7:6511

[bdavina]

Discussed in triage. Moving to icebox, this is lower priority and will be addressed if needed in the future. Will assign to Santi to review if we move forward.