bevy_picking: Apply #![deny(clippy::allow_attributes, clippy::allow_attributes_without_reason)] (#17302)

# 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_picking` in line with the new restrictions.

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

crates/bevy_picking/src/lib.rs

@@ -155,6 +155,11 @@
 //! the plugin with arbitrary backends and input methods, yet still use all the high level features.
 
 #![deny(missing_docs)]
+#![deny(
+    clippy::allow_attributes,
+    clippy::allow_attributes_without_reason,
+    reason = "See #17111; To be removed once all crates are in-line with these attributes"
+)]
 
 extern crate alloc;