feat(frontend): convert to read vector index on covering vector index

[wenym1]

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What's changed and what's your intention?

Convert

LogicalVectorSearch { distance_type: InnerProduct, top_n: 5, left: $2, right: OpenaiEmbedding('{"model": "model"}':Jsonb, 'hello':Varchar)::Vector(3), output_columns: [items.id:Int32, items.name:Varchar] }
    └─LogicalScan { table: items, columns: [items.id, items.name, items.embedding] }

to

└─BatchProject { exprs: [Field(Unnest($1), 1:Int32) as $expr1, Field(Unnest($1), 0:Int32) as $expr2, Field(Unnest($1), 2:Int32) as $expr3] }
  └─BatchProjectSet { select_list: [Unnest($1)] }
    └─BatchVectorSearch { schema: [:Vector(3), vector_info:List(Struct(StructType { fields: [("name", Varchar), ("items.id", Int32), ("__distance", Float64)] }))], top_n: 5, distance_type: InnerProduct, index_name: "vector_index", vector:  }
      └─BatchValues { rows: [[OpenaiEmbedding('{"model": "model"}':Jsonb, 'hello':Varchar)::Vector(3)]] }

in LogicalVectorSearch::to_batch when seeing vector index that covers the columns to query.

Checklist

• I have written necessary rustdoc comments.
• I have added necessary unit tests and integration tests.
• I have added test labels as necessary.
• I have added fuzzing tests or opened an issue to track them.
• My PR contains breaking changes.
• My PR changes performance-critical code, so I will run (micro) benchmarks and present the results.
• I have checked the Release Timeline and Currently Supported Versions to determine which release branches I need to cherry-pick this PR into.

Documentation

• My PR needs documentation updates.

Release note

[wenym1]

• feat(frontend): support create vector index on function expression #22808
• feat(frontend): support vector search lookup join on non-covered columns #22773
• feat(frontend): convert to read vector index on covering vector index #22545 👈 (View in Graphite)
• feat(frontend): optimizer rule to convert vector top n to vector index read #22467
• feat(batch): support vector index nearest batch executor #22348
• feat(frontend): support create vector index on frontend #22432
• feat(streaming): implement vector index write executor #22241
• main

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[chenzl25]

LGTM