feature: add aws iam auth translator for kubernetes

plugins/kubernetes-backend/package.json

@@ -31,11 +31,14 @@
     "clean": "backstage-cli clean"
   },
   "dependencies": {
+    "@aws-sdk/credential-provider-node": "^3.3.0",
     "@backstage/backend-common": "^0.4.3",
     "@backstage/catalog-model": "^0.6.1",
     "@backstage/config": "^0.1.2",
     "@kubernetes/client-node": "^0.13.2",
+    "@types/aws4": "^1.5.1",
     "@types/express": "^4.17.6",
+    "aws4": "^1.11.0",
     "compression": "^1.7.4",
     "cors": "^2.8.5",
     "express": "^4.17.1",