Making `security` a first class citizen of Kibana Core examples about kibana HOT 4 OPEN

Reporting uses getCurrentUser and licensing from the Security Plugin.
I'll migrate getCurrentUser as part of On-Week (June 2024).
We have to wait for licensing to be exposed from Core before completely migrating off of (and removing) the security Plugin.

@tsullivan will search for a client-side use case as part of On-Week June 2024.

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I have found a few plugins throughout Kibana that call security.authc.getCurrentUser from browser-side code.

• src/plugins/data_views/public:
  • Has a "getter" type called UserIdGetter. This is needed in the Data Views API client, which sends a user-hash field in request headers.
• src/plugins/image_embeddable:
  • The Image Editor Flyout has a feature to allow the user to delete a file, based on whether the current user ID is stored in the file metadata.
• x-pack/plugins/cases/public:
  • A useCurrentUser hook to build a query filter that gets the recent cases belonging to the current user
• x-pack/plugins/cloud_integrations/cloud_links/public:
  • The current user is checked whether they are a cloud user before adding Cloud links to the security nav controls.
• x-pack/plugins/data_visualizer/public:
  • used to generate text for a Filebeat configuration
  • used to generate a browser session seed for a FieldStats request

Some additional areas that security.authc is used in browser-side code:

• x-pack/plugins/enterprise_search/public Already consumes getCurrentUser from core.security
• x-pack/plugins/fleet/public Doesn't consume getCurrentUser
• x-pack/plugins/maps/public
• x-pack/plugins/observability_solution/apm/public
• x-pack/plugins/observability_solution/observability_ai_assistant_app/public
• x-pack/plugins/stack_connectors/public Doesn't consume getCurrentUser

I'd like to focus on an area or areas where updating the code to use core.security APIs will allow me to remove the security dependency from a plugin.

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Pinging @elastic/kibana-core (Team:Core)

from kibana.

Pinging @elastic/kibana-security (Team:Security)

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