[8.19](backport #44785) filebeat/input/udp: add fleet input status updating

[mergify]

Proposed commit message

• Add fleet input status updating to the UDP input

Checklist

• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have made corresponding change to the default configuration files
• I have added tests that prove my fix is effective or that my feature works
• I have added an entry in CHANGELOG.next.asciidoc or CHANGELOG-developer.next.asciidoc.

Disruptive User Impact

Author's Checklist

How to test this PR locally

Related issues

• Closes [Filebeat] Add health status reporting to UDP input #44419

Use cases

Screenshots

Logs

---

This is an automatic backport of pull request #44785 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of cbe3da9 has failed:

On branch mergify/bp/8.19/pr-44785
Your branch is up to date with 'origin/8.19'.

You are currently cherry-picking commit cbe3da935.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   CHANGELOG.next.asciidoc

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   filebeat/input/udp/input.go

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

[elasticmachine]

Pinging @elastic/elastic-agent-data-plane (Team:Elastic-Agent-Data-Plane)

[elasticmachine]

Pinging @elastic/sec-deployment-and-devices (Team:Security-Deployment and Devices)