bevy_text: Apply #![deny(clippy::allow_attributes, clippy::allow_attributes_without_reason)] (#17285)

# 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_text` in line with the new restrictions.

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

crates/bevy_text/src/lib.rs

@@ -28,6 +28,11 @@
 //!    retrieving glyphs from the cache, or rasterizing to a [`FontAtlas`] if necessary.
 //! 3. [`PositionedGlyph`]s are stored in a [`TextLayoutInfo`],
 //!    which contains all the information that downstream systems need for rendering.
+#![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;