[PPL] Support expression in syntax

[chloe-zh]

Issue #, if available:

• [PPL] aggregation doesn't support expression as arguments #515

Description of changes:

Support nested valueExpression in syntax and parser
In our grammar file, the related nested expressions are structured as follows:

└─ expression
   |— logicalExpression
   |— comparisonExpression
      |— compareExpr ( := left=valueExpression comparisonOperator right=valueExpression )
      └─ inExpr ( := valueExpression IN valueList )
   └─ valueExpression
      |— binaryArithmetic ( := left=valueExpression binaryOperator right=valueExpression )
      └─ primaryExpression
         |— evalFunctionCall ( := evalFunctionName '(' valueExpression... ')' )
         |— fieldExpression
         └─ literalValue

└─ statsFunction ( := statsFunctionName '(' valueExpression ')' )

(Note: Left recursion can be avoid by tagging the context with custom name)

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[dai-chen]

LGTM. Thanks!

[penghuo]

Thanks for the change.