[bug] teardown times out

[dignifiedquire]

• test is sometimes flakytest_two_devices_setup_teardown
• sometims netsim is unhappy and times out, eventhough the transfer was a success

first failure e7bf47d

failed runs

• https://github.com/n0-computer/iroh/actions/runs/19428077011/job/55580202312
• https://github.com/n0-computer/iroh/actions/runs/19431090035/job/55590010080?pr=3669
• https://github.com/n0-computer/iroh/actions/runs/19431090035/job/55590010045?pr=3669

[matheus23]

Downloaded the logs archives to make sure they don't expire.

logs_50076608492.zip

logs_50085044871.zip

[dignifiedquire]

Fixes

• test(iroh): Fix test_two_devices_setup_teardown hanging #3675
• fix(multipath): fix remote state actor termination #3676