Feat/convert return reason service to typescript (#1961)

**What**
- Convert return reason service to typescript

Fixes CORE-355

integration-tests/api/__tests__/admin/return-reason.js

@@ -1,6 +1,4 @@
-const { match } = require("assert")
 const path = require("path")
-const { RepositoryNotTreeError } = require("typeorm")
 
 const setupServer = require("../../../helpers/setup-server")
 const { useApi } = require("../../../helpers/use-api")
@@ -17,7 +15,7 @@ describe("/admin/return-reasons", () => {
   beforeAll(async () => {
     const cwd = path.resolve(path.join(__dirname, "..", ".."))
     dbConnection = await initDb({ cwd })
-    medusaProcess = await setupServer({ cwd })
+    medusaProcess = await setupServer({ cwd, verbose: false })
   })
 
   afterAll(async () => {