arrays and approximate count aggregators

[clintropolis]

Description

Split out support for ARRAY typed inputs to HLL and Theta sketches, as well as bloom filter and aggregator from #14542 to give it a proper standalone review.

changes:

• add support to hll and theta sketch aggs for array inputs, converting arrays to byte[] form. native agg specs have a flag to indicate if ingest time lists should be handled as arrays or mvds
• add support to bloom filter and aggregator for array inputs, converting arrays to byte[] form

Release note

---

This PR has:

• been self-reviewed.
• added documentation for new or modified features or behaviors.
• a release note entry in the PR description.
• added Javadocs for most classes and all non-trivial methods. Linked related entities via Javadoc links.
• added comments explaining the "why" and the intent of the code wherever would not be obvious for an unfamiliar reader.
• added unit tests or modified existing tests to cover new code paths, ensuring the threshold for code coverage is met.
• been tested in a test Druid cluster.

[github-actions]

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It will be closed in 4 weeks if no further activity occurs. If you think
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Thank you for your contributions.

[github-actions]

This pull request has been marked as stale due to 60 days of inactivity.
It will be closed in 4 weeks if no further activity occurs. If you think
that's incorrect or this pull request should instead be reviewed, please simply
write any comment. Even if closed, you can still revive the PR at any time or
discuss it on the dev@druid.apache.org list.
Thank you for your contributions.

[github-actions]

This pull request/issue has been closed due to lack of activity. If you think that
is incorrect, or the pull request requires review, you can revive the PR at any time.