25.8.15 Stable backport of #88341, #89914

[zvonand]

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):

• Now datalakes catalogs will be shown in system introspection tables only if show_data_lake_catalogs_in_system_tables explicitly enabled (Disable catalogs in system tables ClickHouse/ClickHouse#88341 by @alesapin)
• Now ClickHouse will show data lake catalog database in SHOW DATABASES query by default (Show datalake catalogs in SHOW DATABASES query ClickHouse/ClickHouse#89914 by @alesapin)

CI/CD Options

Exclude tests:

• Fast test
• Integration Tests
• Stateless tests
• Stateful tests
• Performance tests
• All with ASAN
• All with TSAN
• All with MSAN
• All with UBSAN
• All with Coverage
• All with Aarch64
• All Regression
• Disable CI Cache

Regression jobs to run:

• Fast suites (mostly <1h)
• Aggregate Functions (2h)
• Alter (1.5h)
• Benchmark (30m)
• ClickHouse Keeper (1h)
• Iceberg (2h)
• LDAP (1h)
• Parquet (1.5h)
• RBAC (1.5h)
• SSL Server (1h)
• S3 (2h)
• Tiered Storage (2h)

[github-actions]

Workflow [PR], commit [c2f9c28]

[zvonand]

S3 fails: Altinity/clickhouse-regression#93

Aggregate fails: uniqTheta was updated in upstream, not related, test will be updated separately by QA team

[CarlosFelipeOR]

After this PR, the following regression tests started passing:

• /iceberg/*/show tables queries
• /iceberg/*/show data lake catalogs in system tables

These tests validate the expected behavior introduced by this PR.

Remaining failures in regression tests:

• S3/*/zero copy replication
  Regression in zero-copy replication introduced in 25.8.15.
  Issue Regression: S3 zero-copy replication leaves replica out of sync in 25.8.15 #1338 was opened and the fix was made upstream.
  Once it is backported, these regression tests will pass.

• /aggregate functions/part 1/uniqTheta
  Failure caused by an upstream bug fix that changed the expected result.
  Snapshots were already updated in Altinity/clickhouse-regression to reflect the correct behavior.
  Failure: RegressionTestsRelease /aggregate functions/part 1/uniqTheta - snapshot outdated clickhouse-regression#96

Adding the verified label.

[CarlosFelipeOR]

The setting changed from true to false in this version, so the line should be:
"show_data_lake_catalogs_in_system_tables", true, false, "Disable catalogs in system tables by default"},

[mkmkme]

88341 is handled by #1239
89914 is handled by #1283

Nothing needs to be done here for Antalya 25.8. Removing from the project