chore: disable rosetta strict mode again (#25315)

Weird things are happening -- the build passes on PR builds but in the
pipeline rosetta is failing.

Not sure what's going on, but it's important that we get a release out
so disable this for now.

Author: rix0rrr

packages/aws-cdk-lib/package.json

@@ -102,7 +102,7 @@
     "metadata": {
       "jsii": {
         "rosetta": {
-          "strict": true
+          "strict": false
         }
       }
     }