Fix abort in iceberg metadata on bad file paths

[Avogar]

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 abort in iceberg metadata on bad file paths

Documentation entry for user-facing changes

• Documentation is written (mandatory for new features)

Information about CI checks: https://clickhouse.com/docs/en/development/continuous-integration/

[robot-ch-test-poll]

This is an automated comment for commit 8fceddd with description of existing statuses. It's updated for the latest CI running

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Check name	Description	Status
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Performance Comparison	Measure changes in query performance. The performance test report is described in detail here. In square brackets are the optional part/total tests	❌ failure
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[kssenii]

Performance Comparison [4/4] — Errors while building the report.

Saw the same in some other PRs, unrelated.

Stateful tests (tsan) — fail: 1

00159_parallel_formatting_json_and_friends - not related

Upgrade check (debug)

#59327