Feat(medusa, admin-ui): Update edit allocation modal (#4071)

* update edit-allocation modal

* add changeset

* update edit-allocation modal

* update allocation modal

.changeset/cool-buckets-explode.md

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+---
+"@medusajs/medusa": patch
+---
+
+feaet(medusa): add description to reservation default fields

.changeset/curly-carpets-remain.md

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+---
+"@medusajs/admin-ui": patch
+---
+
+feat(admin-ui): update edit allocation modal design