FabricBot: Onboarding to GitOps.ResourceManagement because of FabricBot decommissioning

[dotnet-policy-service[bot]]

Add prIssueManagement.yml to onboard repo to GitOps.ResourceManagement as FabricBot replacement

Details on the replacement service and the syntax of the new yaml configuration file is available publicly at: https://microsoft.github.io/GitOps/policies/resource-management.html

Please review and merge this PR to complete the process of onboarding to the new service.