Enable clippy::nonminimal_bool (#8755)

This PR enables the
[`clippy::nonminimal_bool`](https://rust-lang.github.io/rust-clippy/master/index.html#/nonminimal_bool)
rule and fixes the outstanding violations.

Release Notes:

- N/A

crates/collab_ui/src/collab_panel.rs

@@ -2506,7 +2506,7 @@ impl CollabPanel {
             .map(|channel| channel.visibility)
             == Some(proto::ChannelVisibility::Public);
         let disclosed =
-            has_children.then(|| !self.collapsed_channels.binary_search(&channel.id).is_ok());
+            has_children.then(|| self.collapsed_channels.binary_search(&channel.id).is_err());
 
         let has_messages_notification = channel_store.has_new_messages(channel_id);
         let has_notes_notification = channel_store.has_channel_buffer_changed(channel_id);