Enable clippy lints on a workspace level

This enables a lot more lints than before in some crates, so this fixed a lot of warnings as well.

crates/tower/Cargo.toml

@@ -7,6 +7,9 @@ license.workspace = true
 homepage.workspace = true
 repository.workspace = true
 
+[lints]
+workspace = true
+
 [dependencies]
 http.workspace = true
 tracing.workspace = true

crates/tower/src/lib.rs

@@ -12,8 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![deny(clippy::all)]
-#![warn(clippy::pedantic)]
 #![allow(clippy::module_name_repetitions)]
 
 mod metrics;