Fix named collections on cluster 23.7

[alkorgun]

Changelog category (leave one):

• Bug Fix (user-visible misbehavior in an official stable release)

Changelog entry (a user-readable short description of the changes that goes to CHANGELOG.md):

Fix named collections related statements: if [not] exists, on cluster. Closes #51609.

Documentation entry for user-facing changes

• Documentation is written (mandatory for new features)

[CLAassistant]

All committers have signed the CLA.

[alkorgun]

I also had to fix 3 issues unrelated to named collections in order to build from current master:

• d6afa3d
• bcc41fb
• 5395d34

[alexey-milovidov]

@alkorgun, you are probably using an outdated compiler. We support clang-16 as a minimum version.

[robot-ch-test-poll2]

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[alkorgun]

@alkorgun, you are probably using an outdated compiler. We support clang-16 as a minimum version.

Yes, that's true, on openSUSE Leap I have only clang-15. Because it builds just fine except those 3 issues, I didn't feel I really had to upgrade my setup. But if I would make further contributions, I'll absolutely do upgrade.

[alkorgun]

Current status

Works fine:

• CREATE NAMED COLLECTION
• CREATE NAMED COLLECTION * ON CLUSTER
• CREATE NAMED COLLECTION IF NOT EXISTS * ON CLUSTER
• ALTER NAMED COLLECTION * SET
• ALTER NAMED COLLECTION * DELETE — but I found another issue Alter named collection allows to delete all keys #52696
• ALTER NAMED COLLECTION * ON CLUSTER
• ALTER NAMED COLLECTION IF EXISTS * ON CLUSTER
• ALTER NAMED COLLECTION * SET * DELETE *
• DROP NAMED COLLECTION
• DROP NAMED COLLECTION * ON CLUSTER
• DROP NAMED COLLECTION IF EXISTS * ON CLUSTER

Test cases:

--- execute on the first node
create named collection foobar as a=1, b=2;
create named collection if not exists foobar on cluster '{cluster}' as a=1, b=2, c=3;
create named collection collection_present_on_first_node as a=1, b=2, s='string', x=0, y=-1;

--- execute on any other node
alter named collection foobar on cluster '{cluster}' set a=2, c=3;
alter named collection foobar on cluster '{cluster}' delete b;
alter named collection foobar on cluster '{cluster}' set a=3 delete c;
alter named collection if exists collection_absent_ewerywhere on cluster '{cluster}' delete b;
alter named collection if exists collection_present_on_first_node on cluster '{cluster}' delete b;

--- execute on every node
select * from system.named_collections;

--- execute on any node
drop named collection foobar on cluster '{cluster}';
drop named collection if exists collection_absent_ewerywhere on cluster '{cluster}';
drop named collection if exists collection_present_on_first_node on cluster '{cluster}';

--- execute on every node
select * from system.named_collections;