x-pack/filebeat/input/http_endpoint: allow endpoint to receive PUT and PATCH requests

[efd6]

Proposed commit message

See title.

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.

Author's Checklist

• The approach taken allows specification of the method that is accepted. A more relaxed approach would allow any of PUT/PATCH/POST.

How to test this PR locally

Related issues

• For [Custom HTTP Endpoint] Supporting PUT method integrations#8066

Use cases

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Logs

[elasticmachine]

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• Start Time: 2023-10-04T21:21:54.990+0000

• Duration: 35 min 6 sec

Test stats 🧪

Test	Results
Failed	0
Passed	1375
Skipped	10
Total	1385

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[elasticmachine]

Pinging @elastic/security-external-integrations (Team:Security-External Integrations)

[efd6]

/test

[andrewkroh]

LGTM.