Add test coverage for QueryDatasetRequest.query

[abey79]

Related

• context Add support for server side filtering of DataFusion DataFrames #12147
• part of https://linear.app/rerun/issue/RR-2613/oss-servers-query-dataset-should-be-more-selective
• sibling https://github.com/rerun-io/dataplatform/pull/2192

What

This PR introduces a set of test for query_dataset with various Query values. The actual test cases are currently limited to those which return ALL chunks from the test recording, because the OSS server currently ignores query. This PR is still valuable because:

1. It tests that the schema is not affected by Some query (turned out it was, see sibling PR).
2. It establishes a test framework that will be very useful when working on RR-2613

This PR also removes the Query.columns_always_include_chunk_ids field because it's pointless. Redap mandates that such column is always returned.

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Result	Commit	Link	Manifest
✅	4170b91	https://rerun.io/viewer/pr/12266	+nightly +main

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