sql: introduce field type ARRAY

This patch introduces ARRAY to SQL. After this patch, all SQL operations
and built-in functions should work correctly with ARRAY values. However,
there is currently no way to create ARRAY values using only SQL tools.

Part of #4762

@TarantoolBot document
Title: Field type ARRAY in SQL

Properties of type ARRAY in SQL:
1) a value of type ARRAY can be implicitly and explicitly cast only
   to ANY;
2) only a value of type ANY with primitive type ARRAY can be explicitly
   cast to ARRAY;
3) a value of any other type cannot be implicitly cast to ARRAY;
4) a value of type ARRAY cannot participate in arithmetic, bitwise,
   comparison, and concatination operations.