Another batch of lint fixes (#36521)

- **Enable a bunch of extra lints**
- **First batch of fixes**
- **More fixes**

Release Notes:

- N/A

crates/gpui_macros/src/test.rs

@@ -86,7 +86,7 @@ impl Parse for Args {
         Ok(Args {
             seeds,
             max_retries,
-            max_iterations: max_iterations,
+            max_iterations,
             on_failure_fn_name,
         })
     }