Fix conflicts: Support nested function in SELECT clause (opensearch-p…

…roject#1490)

Users can now query nested fields in an index.

---------

Signed-off-by: forestmvey <forestv@bitquilltech.com>

sql/src/main/java/org/opensearch/sql/sql/parser/AstExpressionBuilder.java

@@ -9,6 +9,7 @@
 import static org.opensearch.sql.ast.dsl.AstDSL.between;
 import static org.opensearch.sql.ast.dsl.AstDSL.not;
 import static org.opensearch.sql.ast.dsl.AstDSL.qualifiedName;
+import static org.opensearch.sql.ast.dsl.AstDSL.stringLiteral;
 import static org.opensearch.sql.expression.function.BuiltinFunctionName.IS_NOT_NULL;
 import static org.opensearch.sql.expression.function.BuiltinFunctionName.IS_NULL;
 import static org.opensearch.sql.expression.function.BuiltinFunctionName.LIKE;