Support passing query context params via JDBC URL

[abhishekagarwal87]

This PR adds support for passing context parameters via JDBC URL. The server will parse the query parameters out of the URL and store them in a thread-local state object that can be later used by DruidMeta to build the query context.

This PR has:

• been self-reviewed.
  • using the concurrency checklist (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 licenses.yaml
• 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.
• added integration tests.
• been tested in a test Druid cluster.

[clintropolis]

#10184 suggests that this should be handled by Avatica, did we investigate that avenue to support jdbc uri parameters? Or is that a different issue? (I haven't really looked at this PR yet).

I guess even if is the same issue, since the upstream issue has not been resolved yet considering how long this has been open it is reasonable to consider having some workaround here, but it does sort of seem conceptually like something that should be handled by Avatica so I wonder if it would be easier and more proper to fix there.

[stale]

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