feat: update AWS service endpoints metadata

Author: aws-sdk-kotlin-ci

codegen/aws-sdk-codegen/src/main/resources/aws/sdk/kotlin/codegen/endpoints.json

@@ -26437,6 +26437,12 @@
         "isRegionalized" : false,
         "partitionEndpoint" : "aws-us-gov-global"
       },
+      "oam" : {
+        "endpoints" : {
+          "us-gov-east-1" : { },
+          "us-gov-west-1" : { }
+        }
+      },
       "oidc" : {
         "endpoints" : {
           "us-gov-east-1" : {