chore(packages): set sideEffects metadata (#7200)

Author: kuhe

packages/signature-v4-crt/package.json

@@ -21,6 +21,7 @@
     "url": "https://aws.amazon.com/javascript/"
   },
   "license": "Apache-2.0",
+  "sideEffects": true,
   "dependencies": {
     "@aws-sdk/crt-loader": "*",
     "@aws-sdk/signature-v4-multi-region": "*",

packages/util-endpoints/package.json

@@ -23,6 +23,7 @@
     "url": "https://aws.amazon.com/javascript/"
   },
   "license": "Apache-2.0",
+  "sideEffects": true,
   "dependencies": {
     "@aws-sdk/types": "*",
     "@smithy/types": "^4.3.1",