[AO] Sync chart pointers on the metric threshold alert details page

[maryam-saeidi]

Closes #155354

Summary

This PR syncs chart pointers on the metric threshold alert details page.

🧪 How to test

• Add xpack.observability.unsafe.alertDetails.metrics.enabled: true to the Kibana config
• Create a metric threshold rule with multiple conditions that generates an alert
• Go to the alert details page and check the chart pointers

[apmmachine]

🤖 GitHub comments

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Just comment with:

• /oblt-deploy : Deploy a Kibana instance using the Observability test environments.
• run elasticsearch-ci/docs : Re-trigger the docs validation. (use unformatted text in the comment!)

[elasticmachine]

Pinging @elastic/actionable-observability (Team: Actionable Observability)

[maryam-saeidi]

Please let me know if you have another idea for mocking.
I tried adding the following line to this mock:

charts: chartPluginMock.createStartContract(),

But then it gives me another error:

Test suite failed to run

    TypeError: Cannot read properties of undefined (reading 'createSetup')

      11 |
      12 | const colors = new LegacyColorsService();
    > 13 | colors.init(coreMock.createSetup().uiSettings);
         |                      ^
      14 |
      15 | export const colorsServiceMock: LegacyColorsService = {
      16 |   createColorLookupFunction: jest.fn(colors.createColorLookupFunction.bind(colors)),

[kibana-ci]

💚 Build Succeeded

• Buildkite Build
• Commit: 5dd7843

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
infra	2.0MB	2.0MB	+186.0B

Page load bundle

Size of the bundles that are downloaded on every page load. Target size is below 100kb

id	before	after	diff
infra	90.7KB	90.8KB	+136.0B

Unknown metric groups

ESLint disabled line counts

id	before	after	diff
securitySolution	394	397	+3

Total ESLint disabled count

id	before	after	diff
securitySolution	474	477	+3

History

• 💔 Build #121574 failed e0d51de

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

cc @maryam-saeidi

[kdelemme]

LGTM

[mohamedhamed-ahmed]

LGTM!