[Reporting] lower roles.enabled deprecation to warning-level

[tsullivan]

Summary

Resolves #113346

Screenshots

Before:

After:

[tsullivan]

closing: using the wrong contributor branch

[tsullivan]

moved tohttps://github.com//pull/114204

[kibanamachine]

💔 Build Failed

• continuous-integration/kibana-ci/pull-request
• Commit: bd41ec6
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• Pipeline Steps (look for red circles / failed steps)
• Interpreting CI Failures

Failed CI Steps

• Jest Unit Tests

---

Test Failures

Kibana Pipeline / jest / Jest Tests.x-pack/plugins/reporting/server/config.deprecations logs a warning if roles.enabled: true is set

Link to Jenkins

Standard Out

Failed Tests Reporter:
  - Test has not failed recently on tracked branches

Stack Trace

Error: expect(received).toMatchInlineSnapshot(snapshot)

Snapshot name: `deprecations logs a warning if roles.enabled: true is set 1`

- Snapshot  - 1
+ Received  + 1

  Array [
-   "Granting reporting privilege through a \"reporting_user\" role will not be supported starting in 8.0. Please set \"xpack.reporting.roles.enabled\" to \"false\" and grant reporting privileges to users using Kibana application privileges **Management > Security > Roles**.",
+   "Using roles defined by \"xpack.reporting.roles.allow\" to grant users the privilege to create a report prevents users from using API Keys to create reports, and prevents admins from using Kibana application privileges to grant users access to create reports.",
  ]
    at Object.<anonymous> (/var/lib/jenkins/workspace/elastic+kibana+pipeline-pull-request/kibana/x-pack/plugins/reporting/server/config/index.test.ts:52:22)
    at Promise.then.completed (/var/lib/jenkins/workspace/elastic+kibana+pipeline-pull-request/kibana/node_modules/jest-circus/build/utils.js:276:28)
    at new Promise (<anonymous>)
    at callAsyncCircusFn (/var/lib/jenkins/workspace/elastic+kibana+pipeline-pull-request/kibana/node_modules/jest-circus/build/utils.js:216:10)
    at _callCircusTest (/var/lib/jenkins/workspace/elastic+kibana+pipeline-pull-request/kibana/node_modules/jest-circus/build/run.js:212:40)
    at processTicksAndRejections (internal/process/task_queues.js:95:5)
    at _runTest (/var/lib/jenkins/workspace/elastic+kibana+pipeline-pull-request/kibana/node_modules/jest-circus/build/run.js:149:3)
    at _runTestsForDescribeBlock (/var/lib/jenkins/workspace/elastic+kibana+pipeline-pull-request/kibana/node_modules/jest-circus/build/run.js:63:9)
    at _runTestsForDescribeBlock (/var/lib/jenkins/workspace/elastic+kibana+pipeline-pull-request/kibana/node_modules/jest-circus/build/run.js:57:9)
    at run (/var/lib/jenkins/workspace/elastic+kibana+pipeline-pull-request/kibana/node_modules/jest-circus/build/run.js:25:3)
    at runAndTransformResultsToJestFormat (/var/lib/jenkins/workspace/elastic+kibana+pipeline-pull-request/kibana/node_modules/jest-circus/build/legacy-code-todo-rewrite/jestAdapterInit.js:176:21)
    at jestAdapter (/var/lib/jenkins/workspace/elastic+kibana+pipeline-pull-request/kibana/node_modules/jest-circus/build/legacy-code-todo-rewrite/jestAdapter.js:109:19)
    at runTestInternal (/var/lib/jenkins/workspace/elastic+kibana+pipeline-pull-request/kibana/node_modules/jest-runner/build/runTest.js:380:16)
    at runTest (/var/lib/jenkins/workspace/elastic+kibana+pipeline-pull-request/kibana/node_modules/jest-runner/build/runTest.js:472:34)
    at Object.worker (/var/lib/jenkins/workspace/elastic+kibana+pipeline-pull-request/kibana/node_modules/jest-runner/build/testWorker.js:133:12)

---

Metrics [docs]

✅ unchanged

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