feat(apple/macOS): Add config to hide admin portal link (#9125)

Adds a `hideAdminPortalMenuItem` bool to our configuration to allow
admins to hide this from users.

Related: #4505

swift/apple/FirezoneKit/Sources/FirezoneKit/Models/Configuration.swift

@@ -19,6 +19,7 @@ public class Configuration: Codable {
     public static let accountSlug = "accountSlug"
     public static let internetResourceEnabled = "internetResourceEnabled"
     public static let firezoneId = "firezoneId"
+    public static let hideAdminPortalMenuItem = "hideAdminPortalMenuItem"
   }
 
   public var authURL: String?
@@ -28,6 +29,7 @@ public class Configuration: Codable {
   public var logFilter: String?
   public var accountSlug: String?
   public var internetResourceEnabled: Bool?
+  public var hideAdminPortalMenuItem: Bool?
 
   private var overriddenKeys: Set<String> = []
 
@@ -42,6 +44,9 @@ public class Configuration: Codable {
     setValue(forKey: Keys.internetResourceEnabled, from: managedDict, and: userDict) { [weak self] in
       self?.internetResourceEnabled = $0
     }
+    setValue(forKey: Keys.hideAdminPortalMenuItem, from: managedDict, and: userDict) { [weak self] in
+      self?.hideAdminPortalMenuItem = $0
+    }
   }
 
   func isOverridden(_ key: String) -> Bool {

swift/apple/FirezoneKit/Sources/FirezoneKit/Views/MenuBar.swift

@@ -422,7 +422,9 @@ public final class MenuBar: NSObject, ObservableObject {
     }
 
     menu.addItem(aboutMenuItem)
-    menu.addItem(adminPortalMenuItem)
+    if !(store.configuration?.hideAdminPortalMenuItem ?? false) {
+      menu.addItem(adminPortalMenuItem)
+    }
     menu.addItem(helpMenuItem)
     menu.addItem(settingsMenuItem)
     menu.addItem(NSMenuItem.separator())