add idenity package to all affected examples

Author: bdemann

examples/experimental/test/end_to_end/http_server/apollo_server/package-lock.json

@@ -9,5 +9,8 @@
         "azle-experimental-deps": "github:demergent-labs/azle-experimental-deps#d520f28563b2d255c7edf5b672da6083fd722259",
         "express": "^4.18.2",
         "graphql": "^16.8.1"
+    },
+    "devDependencies": {
+        "@dfinity/identity-secp256k1": "3.2.1"
     }
 }