Add support for raw JSON filter predicates

[yashmayya]

• Currently, raw JSON values (non dictionary encoded) can't be queried directly via predicates like =, !=, IN, NOT IN and JSON columns are typically queried using the JSON_MATCH filter predicate that uses the JSON index.
• Attempting to do so results in errors like:

QueryExecutionError:
org.apache.pinot.spi.exception.BadQueryRequestException: java.lang.IllegalStateException: Unsupported data type: JSON
	at org.apache.pinot.core.operator.filter.predicate.PredicateEvaluatorProvider.getPredicateEvaluator(PredicateEvaluatorProvider.java:94)
	at org.apache.pinot.core.operator.filter.predicate.PredicateEvaluatorProvider.getPredicateEvaluator(PredicateEvaluatorProvider.java:100)
	at org.apache.pinot.core.plan.FilterPlanNode.constructPhysicalOperator(FilterPlanNode.java:310)
	at org.apache.pinot.core.plan.FilterPlanNode.run(FilterPlanNode.java:93)
...
Caused by: java.lang.IllegalStateException: Unsupported data type: JSON
	at org.apache.pinot.core.operator.filter.predicate.EqualsPredicateEvaluatorFactory.newRawValueBasedEvaluator(EqualsPredicateEvaluatorFactory.java:87)
	at org.apache.pinot.core.operator.filter.predicate.PredicateEvaluatorProvider.getPredicateEvaluator(PredicateEvaluatorProvider.java:76)
	... 24 more

• However, for certain simple JSON values, it could be useful to allow direct comparison using predicates like =, !=, IN, NOT IN via direct string matching like is done for STRING columns since the stored type for JSON columns is also STRING.
• We'd need to document that things like formatting / spacing and object key order aren't considered (since that would slow things down significantly) and such use cases are better served with the JSON index and JSON_MATCH filter predicate.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 62.14%. Comparing base (59551e4) to head (8d7e1e8).
Report is 1150 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #13283      +/-   ##
============================================
+ Coverage     61.75%   62.14%   +0.38%     
+ Complexity      207      198       -9     
============================================
  Files          2436     2536     +100     
  Lines        133233   139403    +6170     
  Branches      20636    21548     +912     
============================================
+ Hits          82274    86626    +4352     
- Misses        44911    46282    +1371     
- Partials       6048     6495     +447     

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