AcaManagedRedisDeploymentTests: version selection prompt timeout during aspire add

[mitchdenny]

Description

The AcaManagedRedisDeploymentTests.DeployStarterWithManagedRedisToAzureContainerApps E2E deployment test fails with a timeout waiting for the version selection prompt during aspire add Aspire.Hosting.Azure.AppContainers.

Error

Hex1b.Automation.WaitUntilTimeoutException: WaitUntil timed out after 00:01:00 waiting for:
  s => waitingForAddVersionSelectionPrompt.Search(s).Count > 0

The test searches for (based on NuGet.config) as the version selection prompt pattern, but this text never appears within the 60-second timeout.

Reproduction

Observed in deployment E2E run 22335251201 on PR #14629.

Impact

This prevents the managed Redis deployment test from running to completion. The failure occurs at step 5 (aspire add Aspire.Hosting.Azure.AppContainers) before any Azure resources are provisioned.

[maddymontaquila]

We think this is a flaky azure infra issue and doesn't need to be fixed