feat(admin-ui, medusa): Improve fulfillment validation (#3541)

* validate that an inventory level exists as well

* improve create-fulfillment handling in admin

* pass along location id rather than inventory level id

* add changeset

* remove dependency

.changeset/twelve-queens-hug.md

@@ -0,0 +1,6 @@
+---
+"@medusajs/admin-ui": patch
+"@medusajs/medusa": patch
+---
+
+fix(medusa, admin-ui): refine create-fulfillment flow