chore: remove organization_id suffix from org_member roles in database (#13473)

Organization member's table is already scoped to an organization.
Rolename should avoid having the org_id appended.

Wipes all existing organization role assignments, which should not be used anyway.

docs/api/audit.md

@@ -68,7 +68,8 @@ curl -X GET http://coder-server:8080/api/v2/audit?limit=0 \
         "roles": [
           {
             "display_name": "string",
-            "name": "string"
+            "name": "string",
+            "organization_id": "string"
           }
         ],
         "status": "active",