### Description
<!-- Describe your changes. -->
Xcode UI tests seem to be flaky:
https://github.com/orgs/community/discussions/68807
Add a couple of retries if we get a "Timed out while loading
Accessibility." error which is transient.
### Motivation and Context
<!-- - Why is this change required? What problem does it solve?
- If it fixes an open issue, please link to the issue here. -->
