chore(regions): update node version in ISO-B partition (#35661)

### Issue # (if applicable)

### Reason for this change
ISO-B partition needed to use Node18 as no newer version was available. Lambda team updated their runtimes and now they support Node22

### Description of changes
Enabling Node22 in ISO-B as the latest node version available in that partition

### Describe any new or updated permissions being added
NA

### Description of how you validated changes
Unit and integration tests updated

### Checklist
- [X] My code adheres to the [CONTRIBUTING GUIDE](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md) and [DESIGN GUIDELINES](https://github.com/aws/aws-cdk/blob/main/docs/DESIGN_GUIDELINES.md)

----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

Author: alvazjor

packages/@aws-cdk-testing/framework-integ/test/aws-apigateway/test/integ.cors-allow-multiple-origins.js.snapshot/manifest.json

@@ -309,15 +309,7 @@
       "Arn"
      ]
     },
-    "Runtime": {
-     "Fn::FindInMap": [
-      "LatestNodeRuntimeMap",
-      {
-       "Ref": "AWS::Region"
-      },
-      "value"
-     ]
-    }
+    "Runtime": "nodejs22.x"
    },
    "DependsOn": [
     "handlerServiceRole187D5A5A"
@@ -352,148 +344,6 @@
    }
   }
  },
- "Mappings": {
-  "LatestNodeRuntimeMap": {
-   "af-south-1": {
-    "value": "nodejs22.x"
-   },
-   "ap-east-1": {
-    "value": "nodejs22.x"
-   },
-   "ap-east-2": {
-    "value": "nodejs22.x"
-   },
-   "ap-northeast-1": {
-    "value": "nodejs22.x"
-   },
-   "ap-northeast-2": {
-    "value": "nodejs22.x"
-   },
-   "ap-northeast-3": {
-    "value": "nodejs22.x"
-   },
-   "ap-south-1": {
-    "value": "nodejs22.x"
-   },
-   "ap-south-2": {
-    "value": "nodejs22.x"
-   },
-   "ap-southeast-1": {
-    "value": "nodejs22.x"
-   },
-   "ap-southeast-2": {
-    "value": "nodejs22.x"
-   },
-   "ap-southeast-3": {
-    "value": "nodejs22.x"
-   },
-   "ap-southeast-4": {
-    "value": "nodejs22.x"
-   },
-   "ap-southeast-5": {
-    "value": "nodejs22.x"
-   },
-   "ap-southeast-6": {
-    "value": "nodejs22.x"
-   },
-   "ap-southeast-7": {
-    "value": "nodejs22.x"
-   },
-   "ca-central-1": {
-    "value": "nodejs22.x"
-   },
-   "ca-west-1": {
-    "value": "nodejs22.x"
-   },
-   "cn-north-1": {
-    "value": "nodejs22.x"
-   },
-   "cn-northwest-1": {
-    "value": "nodejs22.x"
-   },
-   "eu-central-1": {
-    "value": "nodejs22.x"
-   },
-   "eu-central-2": {
-    "value": "nodejs22.x"
-   },
-   "eu-isoe-west-1": {
-    "value": "nodejs22.x"
-   },
-   "eu-north-1": {
-    "value": "nodejs22.x"
-   },
-   "eu-south-1": {
-    "value": "nodejs22.x"
-   },
-   "eu-south-2": {
-    "value": "nodejs22.x"
-   },
-   "eu-west-1": {
-    "value": "nodejs22.x"
-   },
-   "eu-west-2": {
-    "value": "nodejs22.x"
-   },
-   "eu-west-3": {
-    "value": "nodejs22.x"
-   },
-   "eusc-de-east-1": {
-    "value": "nodejs22.x"
-   },
-   "il-central-1": {
-    "value": "nodejs22.x"
-   },
-   "me-central-1": {
-    "value": "nodejs22.x"
-   },
-   "me-south-1": {
-    "value": "nodejs22.x"
-   },
-   "mx-central-1": {
-    "value": "nodejs22.x"
-   },
-   "sa-east-1": {
-    "value": "nodejs22.x"
-   },
-   "us-east-1": {
-    "value": "nodejs22.x"
-   },
-   "us-east-2": {
-    "value": "nodejs22.x"
-   },
-   "us-gov-east-1": {
-    "value": "nodejs22.x"
-   },
-   "us-gov-west-1": {
-    "value": "nodejs22.x"
-   },
-   "us-iso-east-1": {
-    "value": "nodejs22.x"
-   },
-   "us-iso-west-1": {
-    "value": "nodejs22.x"
-   },
-   "us-isob-east-1": {
-    "value": "nodejs18.x"
-   },
-   "us-isob-west-1": {
-    "value": "nodejs18.x"
-   },
-   "us-isof-east-1": {
-    "value": "nodejs22.x"
-   },
-   "us-isof-south-1": {
-    "value": "nodejs22.x"
-   },
-   "us-west-1": {
-    "value": "nodejs22.x"
-   },
-   "us-west-2": {
-    "value": "nodejs22.x"
-   }
-  }
- },
  "Parameters": {
   "BootstrapVersion": {
    "Type": "AWS::SSM::Parameter::Value<String>",