[I] [Feature] skip table lookup for meta-columns-only vector search [paimon]

["Stefanietry (via GitHub)" <gi...@apache.org>]

Stefanietry opened a new issue, #8484:
URL: https://github.com/apache/paimon/issues/8484

   ### Search before asking
   
   - [x] I searched in the [issues](https://github.com/apache/paimon/issues) and found nothing similar.
   
   
   ### Motivation
   
   skip table lookup for meta-columns-only vector search since row ids and scores are already available from the index result
   
   ### Solution
   
   _No response_
   
   ### Anything else?
   
   _No response_
   
   ### Are you willing to submit a PR?
   
   - [x] I'm willing to submit a PR!


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