DRILL-8055: Druid Plugin support for V0.20 and up (#2387)
* DRILL-8055: first edits... compile and normal test works, but TestDrillQueries has problems in compose file. I need to address them first.
* DRILL-8055: removed old SelectQuery.java and SelectQueryBuilder.java
* DRILL-8055: Rewrote SelectQuery to ScanQuery
* DRILL-8055: Switched SelectQuery to ScanQuery
* DRILL-8055: removed old SelectQuery.java and SelectQueryBuilder.java
* DRILL-8055: Switched to Druid 0.22.0 and changed Query for testTwoANDdEqualsFilter... First Test positive
* DRILL-8055: Fixed 4 of 5 Druid Test Queries from TestDruidQueries.java
* DRILL-8055: All TestDruidQueries.java run successfully
* DRILL-8055: Some Code Cleanup
* DRILL-8055: Fixed license header
* DRILL-8055: Fixed automated tests
* DRILL-8055: removed unused code
* DRILL-8055: updated README.md
* DRILL-8055: Switched to BigInteger for Druid Offset
* DRILL-8055: removed commented out code
Co-authored-by: Christian Pfarr <z0ltrix@pm.me>
