Add ignore rule for migrated_to_new_structure column
What does this MR do and why?
This MR ignores migrated_to_new_structure column preparing us for dropping it along with indices
Related to #347032
MR acceptance checklist
This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.
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I have evaluated the MR acceptance checklist for this MR.