[Security Solution] Automatic dashboard migration agent initial implementation

[semd]

Summary

Initial implementation of the dashboard translation agent.

Includes:

• new dashboard migration graph
• generic classes and task management abstracted
• code encapsulation for reusable libraries

Dashboard migration graph

• translatePanel sub-graph is executed on a per-panel basis, concurrently.
• Panel translations are aggregated in the last aggregateDashboard node to create the elastic dashboard JSON.

[elasticmachine]

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[logeekal]

❗ Move to Inference Model

As mentioned in this PR : #206710, we no longer need to use per-provider based model and can simply use InferenceChatModel. See if we can make this changes in this PR itself.

[logeekal]

@semd , this PR has been closed in in favor of below 2 PRs.

• [Automatic migrations] Dashboard v/s Rule Migration generic logic #232526
• [Automatic Migrations] Dashboard migration agent initial Implementation #232637