[8.13] Add `http.payloadTimeout` config option (#177309)

[kibanamachine]

Backport

This will backport the following commits from main to 8.13:

• Add `http.payloadTimeout` config option (#177309)

Questions ?

Please refer to the Backport tool documentation

[github-actions]

A documentation preview will be available soon.

• 🔨 Buildkite builds
• 📚 HTML diff
• 📙 Preview page

Request a new doc build by commenting

• Rebuild this PR: run docs-build
• Rebuild this PR and all Elastic docs: run docs-build rebuild

_{run docs-build is much faster than run docs-build rebuild. A rebuild should only be needed in rare situations.}

_{If your PR continues to fail for an unknown reason, the doc build pipeline may be broken. Elastic employees can check the pipeline status here.}

[kibana-ci]

💚 Build Succeeded

• Buildkite Build
• Commit: 4eb0834

Metrics [docs]

Public APIs missing comments

Total count of every public API that lacks a comment. Target amount is 0. Run node scripts/build_api_docs --plugin [yourplugin] --stats comments for more detailed information.

id	before	after	diff
@kbn/core-http-server-internal	72	73	+1
@kbn/server-http-tools	57	58	+1
total			+2

Unknown metric groups

API count

id	before	after	diff
@kbn/core-http-server-internal	84	85	+1
@kbn/server-http-tools	61	62	+1
total			+2

To update your PR or re-run it, just comment with:
@elasticmachine merge upstream

cc @pgayvallet