`tools/amplify-preview` improvements

[taraspos]

Summary

Following improvements for amplift-preview can be implemented:

• Make retries-count configurable
  

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

  Lines 46 to 49 in b37f702

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

• 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:

  - https://github.com/gravitational/teleport/pull/48512#issuecomment-2557357755
  

• Report failure if retries-count reached

• Cancel all pending jobs when submitting new one

• Delete Amplify branches/previews when PR is closed branch is not deleted, to reduce number of "abandoned" previes that count towards limit.

[taraspos]

It also seems like we're hitting this case in Teleport repo:

• Wrong behaviour when combining 'continue-on-error' and 'failure()' in subsequent steps actions/toolkit#1034