release-23.1: workload/schemachange: handle desc ID generator errors #126905
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Previously, during migrations to version 23.1, if a descriptor ID generator error occurred during CREATE SCHEMA, the process would incorrectly fail in this test. This error is expected due to the addition of a new sequence for tracking descriptor IDs in version 23.1. To resolve this, this patch introduces logic to detect and ignore this error specifically for CREATE SCHEMA operations.
Fixes: #126784
Release justification: test only change
Release note: None