style: some small fixes

- remove invalid struct pattern
lint message: struct pattern is not needed for a unit variant
help: for further information visit https://rust-lang.github.io/rust-clippy/rust-1.92.0/index.html#unneeded_struct_pattern
- remove call to default() on unit struct
lint message: use of `default` to create a unit struct
help: for further information visit https://rust-lang.github.io/rust-clippy/rust-1.92.0/index.html#default_constructed_unit_structs
- replace if/else by direct affectation
lint message: this if-then-else expression assigns a bool literal
help: for further information visit https://rust-lang.github.io/rust-clippy/rust-1.92.0/index.html#needless_bool_assign
- replace assert_eq on unit by `unwrap` + let typed binding

src/api/s3/router.rs

@@ -1011,7 +1011,7 @@ mod tests {
 		// no bucket, won't work with the rest of the test suite
 		assert!(matches!(
 			parse("GET", "/", None, None).0,
-			Endpoint::ListBuckets { .. }
+			Endpoint::ListBuckets
 		));
 		assert!(matches!(
 			parse("GET", "/", None, None).0.authorization_type(),