sekingme opened a new pull request #8983: Enable parameters 'resultAsArray' 
working in materialized-view-selection with a group by query
   Enable parameter '**resultAsArray'** working in materialized-view-selection 
with a group by query.
   **Reference to the PR: GroupBy array-based result rows. (#8196)**
   PR (#8196) realize a new resultRow return in group by query and give a 
parameter choice for user to back to the old appropriate(array- or map-based 
rows). However, the parameter is not working in materialized-view-selection 
when user use query type 'view'. 
   In fact, the PR (#8196) totally ignored the situation of materialized-view. 
So, fix it.
   The realization has been tested for 2 weeks in our cluster!
   This PR has:
   - [x] been self-reviewed.
   - [ ] using the [concurrency 
 (Remove this item if the PR doesn't have any relation to concurrency.)
   - [ ] added documentation for new or modified features or behaviors.
   - [ ] added Javadocs for most classes and all non-trivial methods. Linked 
related entities via Javadoc links.
   - [ ] added or updated version, license, or notice information in 
   - [ ] added comments explaining the "why" and the intent of the code 
wherever would not be obvious for an unfamiliar reader.
   - [x] added unit tests or modified existing tests to cover new code paths.
   - [x] added integration tests.
   - [x] been tested in a test Druid cluster.
   <!-- Check the items by putting "x" in the brackets for the done things. Not 
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   ##### Key changed/added classes in this PR
    * `MaterializedViewQueryQueryToolChest`
    * `MaterializedViewQueryQueryToolChestTest`

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