tools/amplify-preview improvements

[taraspos]

Summary

Following improvements for amplift-preview can be implemented:

1. Make retries-count configurable
   

   shared-workflows/tools/amplify-preview/main.go

   Lines 46 to 49 in b37f702

   	const (
   	jobWaitSleepTime = 30 * time.Second
   	jobWaitTimeAttempts = 40
   	)

2. Set relevant outputs to GITHUB_OUTPUT:

   • Preview App ID
   • Preview Branch Name
   • Preview Job ID

   Those values can be used then to compose copy-pastable command to fetch deployment logs (like aws amplify get-job --app-id <APP_ID> --branch-name <BRANCH_NAME> --job-id <JOB_ID> and printed in case of error:

   • gha(amplify-preview): use custom action to generate Amplify previews for Teleport Docs teleport#48512 (comment)