Change Area Land Use Classification nodegroup cardinality

[SDScandrettKint]

Changes cardinality of Land Use Classification in the Area resource model from "1" to "n" to match the Monument model.

Fixes #1194

@Philbox interested in your thoughts on this - can an Area resource have multiple Land Use Classification tiles in the same way as Mons?

@aj-he I've targeted this at the upgrade branch for now as it isn't a big change, but it can be changed to target the dev branch for after the launch.

[aj-he]

@SDScandrettKint added to Roadmap Backlog. Once the current 1077 working branch is merged into dev/1.0.x, we can look at this. Will need to check implications on the custom reports and export templates.

[aj-he]

@SDScandrettKint can you double check the Area report to check LUC is rendering ok (multi-row table).

[SDScandrettKint]

@SDScandrettKint can you double check the Area report to check LUC is rendering ok (multi-row table).

@aj-he multiple Land Use Classification nodes render correcly in the report table