Report room and decline & block screens tweaks (#4044)

* report rom and decline and block screens tweaks

- Use the copies: "Leave room" and "Report room" everywhere, also in DMs
- Report reason in report room is now mandatory.
- Report reason in decline and block is now mandatory if the report action is set to on.
- Generic alert for failure of main API in both report room and decline and block has been added

* report room and decline and block screen previews

ElementX/Sources/Screens/DeclineAndBlockScreen/DeclineAndBlockScreenModels.swift

@@ -15,7 +15,10 @@ struct DeclineAndBlockScreenViewState: BindableState {
     var bindings = DeclineAndBlockScreenViewStateBindings()
     
     var isDeclineDisabled: Bool {
-        !bindings.shouldBlockUser && !bindings.shouldReport
+        if bindings.shouldReport {
+            return bindings.reportReason.isEmpty
+        }
+        return !bindings.shouldBlockUser && !bindings.shouldReport
     }
 }
 
@@ -23,9 +26,15 @@ struct DeclineAndBlockScreenViewStateBindings {
     var shouldBlockUser = true
     var shouldReport = false
     var reportReason = ""
+    
+    var alert: AlertInfo<DeclineAndBlockAlertType>?
 }
 
 enum DeclineAndBlockScreenViewAction {
     case decline
     case dismiss
 }
+
+enum DeclineAndBlockAlertType {
+    case declineFailed
+}