'Set for IN is not created yet' error with single value IN condition and row level security

[bgranvea]

Requests with "IN (single value)" criteria return an error if user has row level security restrictions.

Tested with version 19.13.3.26 (docker image)

How to reproduce:

1. configure /etc/clickhouse-server/users.d/user.xml:

<?xml version="1.0"?>
<yandex>
    <users>
        <test>
            <profile>default</profile>
            <quota>default</quota>

            <networks replace="replace">
                <ip>::/0</ip>
            </networks>

            <password>test</password>

            <allow_databases>
                <database>default</database>
            </allow_databases>

            <databases>
                <default>
                    <test_in>
                        <filter>a = 'a'</filter>
                    </test_in>
                </default>
            </databases>
        </test>
    </users>
</yandex>

2. create table:

create table test_in (a String,b String,c String) Engine=MergeTree order by (a,b);
insert into test_in values('a','b','c'),('aa','bb','cc');

3. with user default:

select * from test_in where a in ('a') => works
select * from test_in where b in ('b') => works
select * from test_in where c in ('c') => works

4. with user test:

select * from test_in where a in ('a') => error
select * from test_in where b in ('b') => error
select * from test_in where c in ('c') => works
select * from test_in where a in ('a','a') => works

Error is: 'Set for IN is not created yet.'

I cannot change the requests as they are automatically generated by Grafana.