Fix S3Select SQL column reference handling (#11957)

This change fixes handling of these types of queries:

- Double quoted column names with special characters:
    SELECT "column.name" FROM s3object
- Double quoted column names with reserved keywords:
    SELECT "CAST" FROM s3object
- Table name as prefix for column names:
    SELECT S3Object."CAST" FROM s3object

pkg/s3select/sql/parser.go

@@ -119,7 +119,9 @@ type JSONPath struct {
 	PathExpr []*JSONPathElement `parser:"(@@)*"`
 
 	// Cached values:
-	pathString string
+	pathString         string
+	strippedTableAlias string
+	strippedPathExpr   []*JSONPathElement
 }
 
 // AliasedExpression is an expression that can be optionally named