Antalya 26.3 Backport of #99935 - Support more flexible data paths validation in iceberg

[mkmkme]

Note for reviewer

While applying this backport, I faced conflicts related to the fact that upstream introduced IcebergPath.cpp in 755a11b. I found the old place of the same code in Utils.cpp and fixed it there instead.

Also, with just these changes, stateless test 04033 was still failing, so I had to apply an additional check in getProperFilePathFromMetadataInfo which is aligned with the state of IcebergPath.cpp in the upstream.

All the added tests are passing locally for me.

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 ClickHouse should properly handle spark-style tables (where we have full absolute path for each file or relative path to common table path) (ClickHouse#99935 by @alesapin)

Documentation entry for user-facing changes

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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)
• S3 Export (2h)
• Swarms (30m)
• Tiered Storage (2h)

[github-actions]

Workflow [PR], commit [a879f09]