test failed in CI: test_action_failure_can_unwind_no_pantry

[iliana]

This test failed on a CI run on "main":

https://github.com/oxidecomputer/omicron/runs/37400967892
https://github.com/oxidecomputer/omicron/runs/37258633618

Log showing the specific test failure:

https://buildomat.eng.oxide.computer/wg/0/details/01JMCM6ZRMXV0MZH3G7YF88PDR/5HQMqa0iK1j8Uxd3j0delSKHNqwPIaxCWJ9WCZYZdDWGvA4W/01JMCM7AVMPW3YY52VMK6YTQ8F#S6135
https://buildomat.eng.oxide.computer/wg/0/details/01JM38MX6F8DR4JVBZ2EMAGW62/DdKPt2MypMNQHAEwJ1qnVj3SCVELYM5cJ2NUU85vHxiEfQm9/01JM38NX768YTP15RW7C6ZCEZM#S5517

Excerpt from the log showing the failure:

thread 'app::sagas::snapshot_create::test::test_action_failure_can_unwind_no_pantry' panicked at nexus/src/app/sagas/test_helpers.rs:382:19:
instance 220fa211-507a-44df-952a-94c592ff0a5f did not transition to no_VMM after 120s: timed out after 120.641741736s

[hawkw]

Ran into this one again on #7794:

https://github.com/oxidecomputer/omicron/pull/7794/checks?check_run_id=38741981473

Logs showing the specific test failure:

https://buildomat.eng.oxide.computer/wg/0/details/01JP8QBXSM3E8256ZS6RBBAEE0/evAVECsHOKDLB8SXqehLmNVkthmlEJ0CquQx3Nl3gnZkwoMF/01JP8QCA448NWW17CQ1GF8GYFY#S6777