Make PassRolePolicy name unique per stack

- Changed from hardcoded 'IDP-PassRolePolicy' to '-PassRolePolicy'
- Resolves AlreadyExists error when deploying multiple stacks
- Ensures each stack has its own unique PassRole policy

Author: Taniya Mathur

iam-roles/cloudformation-management/IDP-Cloudformation-Service-Role.yaml

@@ -109,7 +109,7 @@ Resources:
   PassRolePolicy:
     Type: AWS::IAM::ManagedPolicy
     Properties:
-      ManagedPolicyName: IDP-PassRolePolicy
+      ManagedPolicyName: !Sub '${AWS::StackName}-PassRolePolicy'
       Description: Policy to allow passing the IDP CloudFormation service role
       PolicyDocument:
         Version: '2012-10-17'