FabricBot: Onboarding to GitOps.ResourceManagement because of FabricBot decommissioning (#510)

* 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.

* Deleting fabricbot.json

---------

Co-authored-by: dotnet-policy-service[bot] <123482357+dotnet-policy-service[bot]@users.noreply.github.com>

.github/fabricbot.json

@@ -1,33 +0,0 @@
-{
-  "version": "1.0",
-  "tasks": [
-    {
-      "taskType": "trigger",
-      "capabilityId": "IssueResponder",
-      "subCapability": "IssuesOnlyResponder",
-      "version": "1.0",
-      "id": "P6vsCOatS",
-      "config": {
-        "conditions": {
-          "operator": "and",
-          "operands": []
-        },
-        "eventType": "issue",
-        "eventNames": [
-          "issues",
-          "project_card"
-        ],
-        "taskName": "Lock new issues",
-        "actions": [
-          {
-            "name": "lockIssue",
-            "parameters": {
-              "reason": "resolved"
-            }
-          }
-        ]
-      }
-    }
-  ],
-  "userGroups": []
-}

.github/policies/resourceManagement.yml

@@ -0,0 +1,18 @@
+id: 
+name: GitOps.PullRequestIssueManagement
+description: GitOps.PullRequestIssueManagement primitive
+owner: 
+resource: repository
+disabled: false
+where: 
+configuration:
+  resourceManagementConfiguration:
+    scheduledSearches: []
+    eventResponderTasks:
+    - if:
+      - payloadType: Issues
+      then:
+      - lockIssue
+      description: Lock new issues
+onFailure: 
+onSuccess: