Intermittent cloud hypervisor crash

[pelikhan]

https://github.com/github/gh-aw/actions/runs/32471751518/job/96740130674#step:32:1

[lpcox]

Resolved by #7582, which added bounded retry/backoff for the Cloud Hypervisor API proxy readiness probe and shipped in AWF v0.28.3: https://github.com/github/gh-aw-firewall/releases/tag/v0.28.3.

The reported failure used AWF v0.28.2. github/gh-aw#54421 upgraded the affected gh-aw workflows to v0.28.3. A subsequent Ponytail Reviewer run using v0.28.3 passed the Cloud Hypervisor connectivity probe (Guest supervisor and trusted service connectivity verified, stage=ready) and completed successfully: https://github.com/github/gh-aw/actions/runs/32480223249.