Fix bug preventing numeric casts for MV columns in filters using the multi-stage query engine

[yashmayya]

• Queries like SELECT * FROM mytable WHERE ARRAY_TO_MV(CAST(mv_col AS BIGINT ARRAY)) = 0; fail when run with the multi-stage query engine with an error like:

Unable to execute query plan for request: 11345490000000000 on server: 192.168.29.25@{61393,61394}, ERROR: java.util.concurrent.ExecutionException: java.lang.RuntimeException: Caught exception while submitting request: 11345490000000000, stage: 1
...
...
Caused by: java.lang.RuntimeException: Caught exception while submitting request: 11345490000000000, stage: 1
...
...
Caused by: java.util.concurrent.ExecutionException: java.lang.IllegalArgumentException: No enum constant org.apache.pinot.spi.data.FieldSpec.DataType.LONG_ARRAY
...
	at org.apache.pinot.query.service.server.QueryServer.lambda$submit$1(QueryServer.java:141)
...

Caused by: java.lang.IllegalArgumentException: No enum constant org.apache.pinot.spi.data.FieldSpec.DataType.LONG_ARRAY
	at java.base/java.lang.Enum.valueOf(Enum.java:273)
	at org.apache.pinot.spi.data.FieldSpec$DataType.valueOf(FieldSpec.java:474)
	at org.apache.pinot.core.query.optimizer.filter.NumericalFilterOptimizer.getDataType(NumericalFilterOptimizer.java:403)
	at org.apache.pinot.core.query.optimizer.filter.NumericalFilterOptimizer.optimizeChild(NumericalFilterOptimizer.java:88)
org.apache.pinot.query.service.dispatch.QueryDispatcher.submit(QueryDispatcher.java:198)
org.apache.pinot.query.service.dispatch.QueryDispatcher.submitAndReduce(QueryDispatcher.java:95)
org.apache.pinot.broker.requesthandler.MultiStageBrokerRequestHandler.handleRequest(MultiStageBrokerRequestHandler.java:216)
org.apache.pinot.broker.requesthandler.BaseBrokerRequestHandler.handleRequest(BaseBrokerRequestHandler.java:133)

• That's because the NumericalFilterOptimizer wasn't handling the ARRAY Calcite types that represent MV fields in the v2 query engine.
• Since MV columns aren't actual arrays and can be queried directly just like SV columns (where rows are matched if any value in the MV field matches the predicate) of the corresponding type, this bug can be fixed by simply stripping the _ARRAY suffix from the target type.

[Jackie-Jiang]

LGTM!