bevy_log: Apply `#![deny(clippy::allow_attributes, clippy::allow_attr…

…ibutes_without_reason)]` (#17246)

# Objective
- #17111

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

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

crates/bevy_log/src/lib.rs

@@ -1,4 +1,9 @@
 #![cfg_attr(docsrs, feature(doc_auto_cfg))]
+#![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"