fix: only delete endpoint which has expired in EndpointCache

[trivikr]

Fixes: #3750

Testing

Code:

import AWS from "../aws-sdk-js/index.js";

const sleep = (ms) => new Promise((resolve) => setTimeout(resolve, ms));

const endpointCache = new AWS.EndpointCache(1000);
endpointCache.put("key", [
  // First endpoint expires in 3 seconds
  { Address: "expires-in-3-seconds", CachePeriodInMinutes: 0.05 },
  // First endpoint expires in 6 seconds
  { Address: "expires-in-6-seconds", CachePeriodInMinutes: 0.1 },
]);

// prints both endpoints
console.log(endpointCache.get("key"));

// Wait for 4 seconds.
await sleep(4000);
// prints endpoint "expires-in-6-seconds"
console.log(endpointCache.get("key"));

await sleep(3000);
// prints undefined
console.log(endpointCache.get("key"));

Output:

[
  { Address: 'expires-in-3-seconds', Expire: 1620242995498 },
  { Address: 'expires-in-6-seconds', Expire: 1620242998498 }
]
[ { Address: 'expires-in-6-seconds', Expire: 1620242998498 } ]
undefined

Checklist

• changelog is added, npm run add-change