[8.19](backport #44438) [beat_receivers] move when monitoring is started

[mergify]

Proposed commit message

For beat receivers move when the HTTP endpoint is started to before when the beater is created. This makes it like
normal" beats and will start the "stats" and "inputs" endpoints.

This does have duplication between mbreceiver and fbreceiver, we can refactor that back into beatreceiver package when we refactor the location of the beatreceiver package.

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

None. Beats receivers not GA and this add "inputs" endpoint that was missing

Author's Checklist

• [ ]

How to test this PR locally

Filebeat

cd x-pack/filebeat/fbreceiver
go test .

Metricbeat

cd x-pack/metricbeat/mbreceiver
go test .

Related issues

• Closes Beats receivers should expose input metrics #43418

Use cases

Screenshots

Logs

---

This is an automatic backport of pull request #44438 done by [Mergify](https://mergify.com).

[elasticmachine]

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

[mergify]

This pull request has not been merged yet. Could you please review and merge it @leehinman? 🙏

[mergify]

This pull request has not been merged yet. Could you please review and merge it @leehinman? 🙏

[pierrehilbert]

@leehinman could you please resolve the conflicts?

[mergify]

This pull request is now in conflicts. Could you fix it? 🙏
To fixup this pull request, you can check out it locally. See documentation: https://help.github.com/articles/checking-out-pull-requests-locally/

git fetch upstream
git checkout -b mergify/bp/8.19/pr-44438 upstream/mergify/bp/8.19/pr-44438
git merge upstream/8.19
git push upstream mergify/bp/8.19/pr-44438

[leehinman]

Closing because without #43356 being backported we won't have individual logging under multiple receivers.

[mergify]

This pull request is now in conflicts. Could you fix it? 🙏
To fixup this pull request, you can check out it locally. See documentation: https://help.github.com/articles/checking-out-pull-requests-locally/

git fetch upstream
git checkout -b mergify/bp/8.19/pr-44438 upstream/mergify/bp/8.19/pr-44438
git merge upstream/8.19
git push upstream mergify/bp/8.19/pr-44438