[REQUEST]: Remove all mention of Beats namespace for Elastic Agent docker images

[jlind23]

Description

Elastic Agent docker images are available under two different namespaces:

• elastic-agent
• beats

Our document almost always use the beats and we should update it to rather talk exclusively about the elastic-agent one.
Example: https://www.elastic.co/guide/en/fleet/current/elastic-agent-container.html

From 9.0 onwards, we plan to remove Elastic Agent images from the beats namespace.

This change can be performed in 8.15.x without issue.

Resources

Example: https://www.elastic.co/guide/en/fleet/current/elastic-agent-container.html

Collaboration

The documentation team will investigate the issue and create the initial content.

Point of contact.

Main contact: @jlind23

Stakeholders: @ycombinator @cmacknz @pierrehilbert @nimarezainia

[kilfoyle]

Here are a couple of PRs to get the docs fixed up:

• Fleet & Agent docs: [Fleet & Agent docs] Change 'beats' namespace to 'elastic-agent' #1315
• Observability docs: [Observability docs] Change 'beats' namespace to 'elastic-agent' observability-docs#4246