[Index Management] Add an index template link to data stream details

[yuliacech]

Summary

Fixes #79845.
This PR adds a link from data stream details flyout to a corresponding index template. The index template is shown in a details flyout of the index templates tab.

How to test

PUT /_ilm/policy/my-data-stream-policy
{
  "policy": {
    "phases": {
      "hot": {
        "actions": {
          "rollover": {
            "max_size": "25GB"
          }
        }
      },
      "delete": {
        "min_age": "30d",
        "actions": {
          "delete": {}
        }
      }
    }
  }
}

PUT /_index_template/my-data-stream-template
{
  "index_patterns": [ "my-data-stream*" ],
  "data_stream": { },
  "priority": 200,
  "template": {
    "settings": {
      "index.lifecycle.name": "my-data-stream-policy"
    }
  }
}

POST /my-data-stream/_doc/
{
  "@timestamp": "2020-12-06T11:04:05.000Z",
  "user": {
    "id": "vlb44hny"
  },
  "message": "Login attempt failed"
}

Screenshot

Release Note

In the Index Management app, you can now click a data stream's index template to view it in the Index Templates tab.

[yuliacech]

@elasticmachine merge upstream

[elasticmachine]

Pinging @elastic/es-ui (Team:Elasticsearch UI)

[sebelga]

LGTM! Tested locally and works as expected. Great job @yuliacech !

I added a note to improve a bit the confidence in the test.

Also, as talked over Zoom, there is an issue for the other link to the ILM policy that can be addressed in a separate PR 👍

[sebelga]

Could we add a check that the correct index template has been loaded?

Looking at the router path + the data-test-subj "title" of the flyout. You might have to mock the response on httpRequestsMockHelpers.setLoadTemplateResponse().

[yuliacech]

@elasticmachine merge upstream

[kibanamachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: fa87478

Metrics [docs]

Async chunks

Total size of all lazy-loaded chunks that will be downloaded as the user navigates the app

id	before	after	diff
indexManagement	1.5MB	1.5MB	+132.0B

History

• 💚 Build #87369 succeeded 2d5baf1
• 💚 Build #86740 succeeded 5c226d9
• 💚 Build #86435 succeeded 7aef553
• 💚 Build #85769 succeeded ce838158a78bb7bd1c232e6c3fb0692a6a15d768

To update your PR or re-run it, just comment with:
@elasticmachine merge upstream

[yuliacech]

Hi @sebelga , thanks a lot for your review! I fixed the error with the ILM link and added a check for template name as you suggested :)