Convert functions with object_storage_cluster setting to cluster functions

[ianton-ru]

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• Improvement

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

Convert functions with object_storage_cluster setting to cluster functions

Documentation entry for user-facing changes

This allows to use old clickhouse version in swarm cluster. All logic with object_storage_cluster setting executed only on initiator, other nodes can work without it.

[altinity-robot]

This is an automated comment for commit e61e67a with description of existing statuses. It's updated for the latest CI running

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Check name	Description	Status
Integration tests	The integration tests report. In parenthesis the package type is given, and in square brackets are the optional part/total tests	❌ failure
Regression aarch64 Tiered Storage s3amazon	There's no description for the check yet, please add it to tests/ci/ci_config.py:CHECK_DESCRIPTIONS	❌ failure
Regression aarch64 Tiered Storage s3gcs	There's no description for the check yet, please add it to tests/ci/ci_config.py:CHECK_DESCRIPTIONS	❌ failure
Regression release Tiered Storage s3amazon	There's no description for the check yet, please add it to tests/ci/ci_config.py:CHECK_DESCRIPTIONS	❌ failure
Regression release Tiered Storage s3gcs	There's no description for the check yet, please add it to tests/ci/ci_config.py:CHECK_DESCRIPTIONS	❌ failure
Sign aarch64	There's no description for the check yet, please add it to tests/ci/ci_config.py:CHECK_DESCRIPTIONS	❌ error
Sign release	There's no description for the check yet, please add it to tests/ci/ci_config.py:CHECK_DESCRIPTIONS	❌ error
Stress test	Runs stateless functional tests concurrently from several clients to detect concurrency-related errors	❌ failure

Successful checks

Check name	Description	Status
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Regression aarch64 Alter attach partition	There's no description for the check yet, please add it to tests/ci/ci_config.py:CHECK_DESCRIPTIONS	✅ success
Regression aarch64 Alter move partition	There's no description for the check yet, please add it to tests/ci/ci_config.py:CHECK_DESCRIPTIONS	✅ success
Regression aarch64 Alter replace partition	There's no description for the check yet, please add it to tests/ci/ci_config.py:CHECK_DESCRIPTIONS	✅ success
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Regression aarch64 part_moves_between_shards	There's no description for the check yet, please add it to tests/ci/ci_config.py:CHECK_DESCRIPTIONS	✅ success
Regression aarch64 selects	There's no description for the check yet, please add it to tests/ci/ci_config.py:CHECK_DESCRIPTIONS	✅ success
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Regression release Clickhouse Keeper SSL	There's no description for the check yet, please add it to tests/ci/ci_config.py:CHECK_DESCRIPTIONS	✅ success
Regression release LDAP authentication	There's no description for the check yet, please add it to tests/ci/ci_config.py:CHECK_DESCRIPTIONS	✅ success
Regression release LDAP external_user_directory	There's no description for the check yet, please add it to tests/ci/ci_config.py:CHECK_DESCRIPTIONS	✅ success
Regression release LDAP role_mapping	There's no description for the check yet, please add it to tests/ci/ci_config.py:CHECK_DESCRIPTIONS	✅ success
Regression release Parquet	There's no description for the check yet, please add it to tests/ci/ci_config.py:CHECK_DESCRIPTIONS	✅ success
Regression release aes_encryption	There's no description for the check yet, please add it to tests/ci/ci_config.py:CHECK_DESCRIPTIONS	✅ success
Regression release atomic_insert	There's no description for the check yet, please add it to tests/ci/ci_config.py:CHECK_DESCRIPTIONS	✅ success
Regression release base_58	There's no description for the check yet, please add it to tests/ci/ci_config.py:CHECK_DESCRIPTIONS	✅ success
Regression release data_types	There's no description for the check yet, please add it to tests/ci/ci_config.py:CHECK_DESCRIPTIONS	✅ success
Regression release datetime64_extended_range	There's no description for the check yet, please add it to tests/ci/ci_config.py:CHECK_DESCRIPTIONS	✅ success
Regression release dns	There's no description for the check yet, please add it to tests/ci/ci_config.py:CHECK_DESCRIPTIONS	✅ success
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Regression release kafka	There's no description for the check yet, please add it to tests/ci/ci_config.py:CHECK_DESCRIPTIONS	✅ success
Regression release kerberos	There's no description for the check yet, please add it to tests/ci/ci_config.py:CHECK_DESCRIPTIONS	✅ success
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Regression release session_timezone	There's no description for the check yet, please add it to tests/ci/ci_config.py:CHECK_DESCRIPTIONS	✅ success
Regression release window_functions	There's no description for the check yet, please add it to tests/ci/ci_config.py:CHECK_DESCRIPTIONS	✅ success
Stateful tests	Runs stateful functional tests for ClickHouse binaries built in various configurations -- release, debug, with sanitizers, etc	✅ success
Stateless tests	Runs stateless functional tests for ClickHouse binaries built in various configurations -- release, debug, with sanitizers, etc	✅ success

[arthurpassos]

What if the user does something creepy like:

select * from s3Cluster("cluster1"...) SETTINGS object_storage_cluster="cluster2";

[arthurpassos]

The diff seems reasonable, just replaces existing function with a clustered version. I don't have the time to check whether this is the right place to apply these changes and etc.

I'll trust your instincts.