feat(medusa): Add ProductVariantInventoryService (#2883)

* add mw feature flag

* add services

* add types

* add module interfaces

* add interface export

* add models for mw

* to be ammended

* remove featureflag

* use correct count

* update cart completion strategy

* swap service conversion

* update return service

* update order service

* update claim service

* add exception to claim item

* update cart service

* add indicies

* add changeset

* nullable changes in store

* store model update

* fix unit tests

* remove old inventory service

* format integration test

* update snapshots

* remove old inventory service tests

* update snapshots

* remove old code

* option updates

* naming

* add jsdoc to pv inventory service

* rename class variables

* pr feedback

* rename option to context

* if(variant_id) instead of if(typeof varia...)

* update tests

* add jsdoc

* go for custom

* update code for readability

integration-tests/api/__tests__/admin/__snapshots__/store.js.snap

@@ -25,6 +25,7 @@ Object {
     },
   ],
   "default_currency_code": "usd",
+  "default_location_id": null,
   "id": Any<String>,
   "invite_link_template": null,
   "metadata": null,
@@ -59,6 +60,7 @@ Object {
     "symbol_native": "￥",
   },
   "default_currency_code": "jpy",
+  "default_location_id": null,
   "id": Any<String>,
   "invite_link_template": null,
   "metadata": null,
@@ -93,6 +95,7 @@ Object {
     "symbol_native": "kr",
   },
   "default_currency_code": "dkk",
+  "default_location_id": null,
   "id": Any<String>,
   "invite_link_template": null,
   "metadata": null,
@@ -121,6 +124,7 @@ Object {
     "symbol_native": "$",
   },
   "default_currency_code": "usd",
+  "default_location_id": null,
   "feature_flags": Any<Array>,
   "fulfillment_providers": Array [
     Object {