Remove ignore_column for migration-related fields in ContainerRepository

What does this MR do and why?

In this MR, we do the step 3 of 3 for removing columns from the database as per our guidelines.

These columns are part of the migration for the container registry which is already completed.

Steps in removing the columns:

• Step 1: Ignored the columns (%17.0): Ignore migration fields in ContainerRepository (!151442 - merged)
• Step 2: Removed the columns (%17.1): Remove migration columns in container repository (!154769 - merged)
• Step 3: Removing the ignore_column 👈 this MR.

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Related to #409873