bevy_gilrs: Apply #![deny(clippy::allow_attributes, clippy::allow_attributes_without_reason)] (#17245)

# Objective
- https://github.com/bevyengine/bevy/issues/17111

## Solution
Set the `clippy::allow_attributes` and
`clippy::allow_attributes_without_reason` lints to `deny`, and bring
`bevy_gilrs` in line with the new restrictions.

## Testing
`cargo clippy --tests --package bevy_gilrs` was run, and no errors were
encountered.

crates/bevy_gilrs/src/lib.rs

@@ -1,5 +1,10 @@
 #![cfg_attr(docsrs, feature(doc_auto_cfg))]
 #![forbid(unsafe_code)]
+#![deny(
+    clippy::allow_attributes,
+    clippy::allow_attributes_without_reason,
+    reason = "See #17111; To be removed once all crates are in-line with these attributes"
+)]
 #![doc(
     html_logo_url = "https://bevyengine.org/assets/icon.png",
     html_favicon_url = "https://bevyengine.org/assets/icon.png"

crates/bevy_gilrs/src/rumble.rs

@@ -21,7 +21,10 @@ struct RunningRumble {
     /// A ref-counted handle to the specific force-feedback effect
     ///
     /// Dropping it will cause the effect to stop
-    #[allow(dead_code)]
+    #[expect(
+        dead_code,
+        reason = "We don't need to read this field, as its purpose is to keep the rumble effect going until the field is dropped."
+    )]
     effect: SyncCell<ff::Effect>,
 }