feat(core-flows, dashboard, medusa, types): optional shipping profile (#11434)

* feat: create product flow changes

* feat: allow unsetting SP on product update

* feat: update prepare line item helper

* test: add testcase

* wip: fix tests

* fix: update module tests

* fix: cart module test

packages/medusa/src/api/admin/products/validators.ts

@@ -232,7 +232,7 @@ export const CreateProduct = z
     options: z.array(CreateProductOption).optional(),
     variants: z.array(CreateProductVariant).optional(),
     sales_channels: z.array(z.object({ id: z.string() })).optional(),
-    shipping_profile_id: z.string(),
+    shipping_profile_id: z.string().optional(),
     weight: z.number().nullish(),
     length: z.number().nullish(),
     height: z.number().nullish(),
@@ -267,7 +267,7 @@ export const UpdateProduct = z
     categories: z.array(IdAssociation).optional(),
     tags: z.array(IdAssociation).optional(),
     sales_channels: z.array(z.object({ id: z.string() })).optional(),
-    shipping_profile_id: z.string().optional(),
+    shipping_profile_id: z.string().nullish(),
     weight: z.number().nullish(),
     length: z.number().nullish(),
     height: z.number().nullish(),