Use work_item_types table for Issue#issue_type_supports?

Mario Celirequested to merge
338005-issue-supports-feature into master

What does this MR do and why?

Small change as part of the effort to remove the issue_type column as described in #338005 (closed). Shipping behind a feature flag to minimize possible performance impact.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

Related to #338005 (closed)

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