CODEOWNERS: assign ownership of x-pack/filebeat/input/internal packages

[efd6]

Proposed commit message

Assign ownership of the httplog and httpmon packages to SEI as these are shared packages used by the CEL and HTTPJSON packages which belong to SEI.

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• 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.

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• Start Time: 2023-08-28T11:49:37.104+0000

• Duration: 13 min 55 sec

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