[Snapshot Restore] Remove cloud validation for slm policy

[alisonelizabeth]

Fixes #92990

Per #92990 (comment), we should no longer be restricting a user from adding more than one policy to a cloud-managed repository. This PR removes the validation logic we had in place for this.

Note: There was not an existing test for this validation, and since this is functionality being removed, I did not add any tests for this specific scenario. However, I did update the existing validation tests for the logistics step to be more robust.

How to test

You will need to mock the cloud environment to test this PR.

1. Specify the path.repo variable when starting ES:

   yarn es snapshot --license trial -E path.repo=/tmp/es-backups
   

2. Add the cluster.metadata.managed_repository and cluster.metadata.managed_policies settings via Console:

   PUT /_cluster/settings
   {
     "persistent": {
       "cluster.metadata.managed_repository": "found-snapshots",
       "cluster.metadata.managed_policies": ["managed-policy"]
     }
   }
   

3. Create a repository with the same name as your setting value (found-snapshots)

4. Create a policy with the same name as your setting value (managed-policy)

5. Verify you are able to create a second SLM policy with the found-snapshots repository without any validation errors.

Release note

The Snapshot and Restore UI now allows a user to configure more than one Snapshot Lifecycle Management (SLM) policy for a cloud-managed repository.

[elasticmachine]

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

[kibanamachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: 08aefe7
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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
snapshotRestore	480.7KB	479.6KB	-1.1KB

History

• 💔 Build #111069 failed 61682ca

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@elasticmachine merge upstream

[yuliacech]

Hi @alisonelizabeth,
thanks a lot for fixing this! Tested locally and all worked for me, code LGTM too 👍