[Alerting] use event log to populate alert details view

[pmuellr]

resolves #57446

Checklist

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• Any text added follows EUI's writing guidelines, uses sentence case text and includes i18n support
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[gmmorris]

@elasticmachine merge upstream

[kibanamachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: 1a1f6e0

History

• 💚 Build #47626 succeeded 5c772133be147898f5a7375275a94b9b08ce60cc
• 💔 Build #47546 failed d3705fa3a65c459a6e21c1d9ab436d5d910e3a3d

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@elasticmachine merge upstream

[pmuellr]

closing this as I'm taking a different approach for now, in #68437