[DOCS-XXXXX] Rewrite Set Up in the Datadog Agent, add Execution Policies enrollment

[irving-santiago]

What does this PR do? What is the motivation?

Fixes DOCS-XXXXX

Rewrites "Set Up in the Datadog Agent" (formerly "Use Private Actions") to cover Execution Policies enrollment alongside Connections: Fleet Automation vs. manual installation per platform tab, real "Update the runner" tabs, a "Manage the runner" section, and Debugging. Removes "Available actions by runner type" (moves to the new Reference page in a later slice in this stack).

Merge readiness

• Ready for merge

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AI assistance

Claude Code carried this page's content over from a pre-drafted, QA-verified draft, ran Vale, and renamed the page title/nav entry to match the new structure.

Additional notes

Flagging for reviewer: the owned/ownerless Fleet-Automation-vs-Manual framing would benefit from a product sanity check. Also, the previous page's "Connect a runner" and "Use a private action" sections aren't present in the new draft — worth confirming that's intentional.

[irving-santiago]

Warning

This pull request is not mergeable via GitHub because a downstack PR is open. Once all requirements are satisfied, merge this PR as a stack on Graphite.
Learn more

• [DOCS-XXXXX] Add Get Started with Private Actions (Execution Policies quickstart) #39054
• [DOCS-XXXXX] Add Private Actions Reference #39053
• [DOCS-XXXXX] Rewrite Run a Script for Execution Policies #39052
• [DOCS-XXXXX] Add Execution Policies #39051
• [DOCS-XXXXX] Add Authorize Private Actions #39050
• [DOCS-XXXXX] Add Enrollment and Ownership #39049
• [DOCS-XXXXX] Add Set Up a Standalone Private Action Runner #39048
• [DOCS-XXXXX] Rewrite Set Up in the Datadog Agent, add Execution Policies enrollment #39047 👈 (View in Graphite)
• [DOCS-XXXXX] Move Handling Private Action Credentials under Connections #39046
• [DOCS-XXXXX] Rewrite Private Actions Overview for Execution Policies #39045
• Add tracking doc for the Private Actions / Execution Policies stack #39044
• master

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[github-actions]

Preview links (active after the build_preview check completes)

Modified Files

• https://docs-staging.datadoghq.com/irving.santiago/par-ep-03-set-up-agent/actions/private_actions/use_private_actions

[datadog-datadog-prod-us1]

⚠️ Warnings

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