build: remove skipLibCheck from AIO examples (#37128)

`skipLibCheck` had to be added to a few AIO examples, because of a breaking change in master. These changes update to a newer version of `angular-in-memory-web-api` that accounts for the breaking change.

PR Close #37128

aio/tools/examples/shared/boilerplate/testing/tsconfig.app.json

@@ -2,9 +2,7 @@
   "extends": "./tsconfig.json",
   "compilerOptions": {
     "outDir": "../out-tsc/app",
-    "types": [],
-    // TODO(FW-2145): turn lib checks back on after fixing in-memory-api and investigating impact of ModuleWithProviders
-    "skipLibCheck": true
+    "types": []
   },
   "files": [
     "src/main.ts",