Resolve "Allow users to set work in progress limits by weight"

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What does this MR do and why?

This MR is to enhance Issue Board's Lists "Work in Progress Limit" to include the ability to set a "weight" as the limit. Before this feature, users would only be able to set the limit to number of issues (items). Existing documentation can be found here: https://docs.gitlab.com/ee/user/project/issue_board.html#work-in-progress-limits

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This feature is being developed as part of a co-create project with Gitlab and Pearson. The Gitlab team member working with the Pearson folks is @jarka

References

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• #119208 (closed)

Relates to #119208 (closed)

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