Compare string with collating in array tuple via binary protocol

[zhixinwen]

Related question to #117849, but with binary protocol.

I have a table:

   CREATE TABLE test_collate (
                id INT8 PRIMARY KEY,
                "string_field" STRING COLLATE en_US_u_ks_level2 NULL,
            )

And this would work in console

root@localhost:26257/defaultdb> PREPARE pselect3 AS SELECT * FROM "test_collate" WHERE (("id", "string_field")) = ANY($1);
PREPARE

Time: 2ms total (execution 1ms / network 1ms)

root@localhost:26257/defaultdb> EXECUTE pselect3(Array[(1, 'str_collate_1')]);
  id | string_field
-----+----------------
   1 | str_collate_1
(1 row)

However if I send the args in binary format, I will receive:

unsupported comparison: collatedstring{en_us_u_ks_level2} to string"

I write the binary encoding for tuple array myself, and uses oid 25 for collated string. It works for all other cases except collated string. Did I miss anything?

[michae2]

Closing in favor of issue #133141.