api(rust and jsonrpc): marknoticed_all_chats method to mark all chats as notices, including muted ones. (#7709)

made for solving

https://github.com/deltachat/deltachat-desktop/issues/5891#issuecomment-3687566470

will also be more efficient, because desktop currently loads all fresh
messages to find out which chats to mark as noticed.
https://github.com/deltachat/deltachat-desktop/blob/76d32bfc9364d53e1ffea40fcf4a60ad9a8482ee/packages/frontend/src/components/AccountListSidebar/AccountItem.tsx#L334


# progress
- [x] implementation
- [x] write a test
- [x] make a pr to use it in desktop
https://github.com/deltachat/deltachat-desktop/pull/5923
- [x] address review comments

---------

Co-authored-by: WofWca <wofwca@protonmail.com>

src/test_utils.rs

@@ -1492,6 +1492,15 @@ impl EventTracker {
     pub fn clear_events(&self) {
         while let Ok(_ev) = self.try_recv() {}
     }
+
+    /// Takes all items from event queue and returns them.
+    pub fn take_events(&self) -> Vec<Event> {
+        let mut events = Vec::new();
+        while let Ok(event) = self.try_recv() {
+            events.push(event);
+        }
+        events
+    }
 }
 
 /// Gets a specific message from a chat and asserts that the chat has a specific length.