chore: remove internal module resources option (#9582)

What:
* removes resouces type "shared" or "isolated" from internal modules.
* modules can have an isolated database connection by providing a database config as part of their options on `medusa-config`

CLOSES: FRMW-2593

packages/medusa-test-utils/src/module-test-runner.ts

@@ -1,6 +1,7 @@
 import {
   ContainerRegistrationKeys,
   DmlEntity,
+  isSharedConnectionSymbol,
   loadModels,
   Modules,
   ModulesSdkUtils,
@@ -118,6 +119,7 @@ export function moduleIntegrationTestRunner<TService = any>({
       options: {
         database: dbConfig,
         ...moduleOptions,
+        [isSharedConnectionSymbol]: true,
       },
     },
   }