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/vim/src/object.rs

@@ -458,7 +458,7 @@ fn argument(
             parent_covers_bracket_range = covers_bracket_range;
 
             // Unable to find a child node with a parent that covers the bracket range, so no argument to select
-            if !cursor.goto_first_child_for_byte(offset).is_some() {
+            if cursor.goto_first_child_for_byte(offset).is_none() {
                 return None;
             }
         }

crates/vim/src/visual.rs

@@ -87,6 +87,7 @@ pub fn visual_motion(motion: Motion, times: Option<usize>, cx: &mut WindowContex
                         // If the file ends with a newline (which is common) we don't do this.
                         // so that if you go to the end of such a file you can use "up" to go
                         // to the previous line and have it work somewhat as expected.
+                        #[allow(clippy::nonminimal_bool)]
                         if !selection.reversed
                             && !selection.is_empty()
                             && !(selection.end.column() == 0 && selection.end == map.max_point())