fix(appmesh): add missing port property (#25112)

Closes #22452 

Adds `port` property to the `HttpGatewayRouteMatch` interface along with a unit test to validate the change.

----

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

Author: sumupitchayan

packages/@aws-cdk-testing/framework-integ/test/aws-appmesh/test/integ.mesh.js.snapshot/cdk.out

@@ -1 +1 @@
-{"version":"20.0.0"}
+{"version":"31.0.0"}

packages/@aws-cdk-testing/framework-integ/test/aws-appmesh/test/integ.mesh.js.snapshot/integ.json

@@ -1,5 +1,5 @@
 {
-  "version": "20.0.0",
+  "version": "31.0.0",
   "testCases": {
     "integ.mesh": {
       "stacks": [

packages/@aws-cdk-testing/framework-integ/test/aws-appmesh/test/integ.mesh.js.snapshot/manifest.json

@@ -1,12 +1,6 @@
 {
-  "version": "20.0.0",
+  "version": "31.0.0",
   "artifacts": {
-    "Tree": {
-      "type": "cdk:tree",
-      "properties": {
-        "file": "tree.json"
-      }
-    },
     "mesh-stack.assets": {
       "type": "cdk:asset-manifest",
       "properties": {
@@ -23,7 +17,7 @@
         "validateOnSynth": false,
         "assumeRoleArn": "arn:${AWS::Partition}:iam::${AWS::AccountId}:role/cdk-hnb659fds-deploy-role-${AWS::AccountId}-${AWS::Region}",
         "cloudFormationExecutionRoleArn": "arn:${AWS::Partition}:iam::${AWS::AccountId}:role/cdk-hnb659fds-cfn-exec-role-${AWS::AccountId}-${AWS::Region}",
-        "stackTemplateAssetObjectUrl": "s3://cdk-hnb659fds-assets-${AWS::AccountId}-${AWS::Region}/ec4bc0974fc8b71ab8d34be8fe53f41a594bd0c03588e03d5a46ac8919288992.json",
+        "stackTemplateAssetObjectUrl": "s3://cdk-hnb659fds-assets-${AWS::AccountId}-${AWS::Region}/e22d0f948e4b9a0aac11f68f048f52c09eeb7d8fef79972eb7e6f957111955bb.json",
         "requiresBootstrapStackVersion": 6,
         "bootstrapStackVersionSsmParameter": "/cdk-bootstrap/hnb659fds/version",
         "additionalDependencies": [
@@ -371,6 +365,12 @@
         ]
       },
       "displayName": "mesh-stack"
+    },
+    "Tree": {
+      "type": "cdk:tree",
+      "properties": {
+        "file": "tree.json"
+      }
     }
   }
 }

packages/@aws-cdk-testing/framework-integ/test/aws-appmesh/test/integ.mesh.js.snapshot/mesh-stack.assets.json

@@ -1,15 +1,15 @@
 {
-  "version": "20.0.0",
+  "version": "31.0.0",
   "files": {
-    "ec4bc0974fc8b71ab8d34be8fe53f41a594bd0c03588e03d5a46ac8919288992": {
+    "e22d0f948e4b9a0aac11f68f048f52c09eeb7d8fef79972eb7e6f957111955bb": {
       "source": {
         "path": "mesh-stack.template.json",
         "packaging": "file"
       },
       "destinations": {
         "current_account-current_region": {
           "bucketName": "cdk-hnb659fds-assets-${AWS::AccountId}-${AWS::Region}",
-          "objectKey": "ec4bc0974fc8b71ab8d34be8fe53f41a594bd0c03588e03d5a46ac8919288992.json",
+          "objectKey": "e22d0f948e4b9a0aac11f68f048f52c09eeb7d8fef79972eb7e6f957111955bb.json",
           "assumeRoleArn": "arn:${AWS::Partition}:iam::${AWS::AccountId}:role/cdk-hnb659fds-file-publishing-role-${AWS::AccountId}-${AWS::Region}"
         }
       }

packages/@aws-cdk-testing/framework-integ/test/aws-appmesh/test/integ.mesh.js.snapshot/mesh-stack.template.json

@@ -1372,6 +1372,7 @@
         "Exact": "example.com"
        },
        "Method": "POST",
+       "Port": 8080,
        "Prefix": "/",
        "QueryParameters": [
         {