Add retention administer permission (#949)

* Add retention administer permission

* Approve

* RetentionAdminister

Author: tothegills

source/Octopus.Client.Tests/PublicSurfaceAreaFixture.ThePublicSurfaceAreaShouldNotRegress..NETCore.approved.txt

@@ -4468,6 +4468,7 @@ Octopus.Client.Model
     static Octopus.Client.Model.Permission ReleaseDelete
     static Octopus.Client.Model.Permission ReleaseEdit
     static Octopus.Client.Model.Permission ReleaseView
+    static Octopus.Client.Model.Permission RetentionAdminister
     static Octopus.Client.Model.Permission RunbookEdit
     static Octopus.Client.Model.Permission RunbookRunCreate
     static Octopus.Client.Model.Permission RunbookRunDelete

source/Octopus.Client.Tests/PublicSurfaceAreaFixture.ThePublicSurfaceAreaShouldNotRegress..NETFramework.approved.txt

@@ -4487,6 +4487,7 @@ Octopus.Client.Model
     static Octopus.Client.Model.Permission ReleaseDelete
     static Octopus.Client.Model.Permission ReleaseEdit
     static Octopus.Client.Model.Permission ReleaseView
+    static Octopus.Client.Model.Permission RetentionAdminister
     static Octopus.Client.Model.Permission RunbookEdit
     static Octopus.Client.Model.Permission RunbookRunCreate
     static Octopus.Client.Model.Permission RunbookRunDelete

source/Octopus.Server.Client/Model/Permission.cs

@@ -281,6 +281,8 @@ public class Permission : IEquatable<Permission>
 
         [Description("Create, edit, delete resources in the Platform Hub")] public static readonly Permission PlatformHubEdit = new("PlatformHubEdit");
 
+        [Description("Administer retention policies")] public static readonly Permission RetentionAdminister = new("RetentionAdminister");
+
         public Permission(string id)
         {
             Id = id;