Suggest to support retry strategy on verification step

[JohnNiang]

Description:

See https://www.rfc-editor.org/rfc/rfc9110#status.409 for more.

Below is an example of test case with retry strategy:

- name: recover
  request:
    api: /content.halo.run/v1alpha1/posts/{{(index .listPosts.items 0).post.metadata.name}}
    method: DELETE
  expect:
    statusCode: 200
  retry:
    on:
      statusCode: 409
    count: 10
    interval: 10s

[optional Relevant Links:]

• https://www.rfc-editor.org/rfc/rfc9110#status.409
• https://skywalking.apache.org/docs/skywalking-infra-e2e/latest/en/setup/configuration-file/#verify

[github-actions]

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[github-actions]

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