liked_only and disliked_only should filter out own users' posts/comments

[aeharding]

Requirements

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• Did you check to see if this issue already exists?
• Is this only a feature request? Do not put multiple feature requests in one issue.
• Is this a backend issue? Use the lemmy-ui repo for UI / frontend issues.
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Is your proposal related to a problem?

It doesn't makes sense to show the user their own posts/comments in liked_only and disliked_only.

Reddit, for example, filters out your own posts/comments from upvoted/downvoted lists.

Describe the solution you'd like.

Filter out own posts/comments when liked_only or disliked_only

Describe alternatives you've considered.

Filtering client-side on an app-by-app basis.

Additional context

No response

[dessalines]

Makes sense. Shouldn't be too difficult.