unwrap_used: Stop recommending using expect when the expect_used lint is not allowed

tests/ui/unwrap_expect_used.rs

@@ -0,0 +1,10 @@
+#![warn(clippy::unwrap_used, clippy::expect_used)]
+
+fn main() {
+    Some(3).unwrap();
+    Some(3).expect("Hello world!");
+
+    let a: Result<i32, i32> = Ok(3);
+    a.unwrap();
+    a.expect("Hello world!");
+}

tests/ui/unwrap_expect_used.stderr

@@ -0,0 +1,36 @@
+error: used `unwrap()` on `an Option` value
+  --> $DIR/unwrap_expect_used.rs:4:5
+   |
+LL |     Some(3).unwrap();
+   |     ^^^^^^^^^^^^^^^^
+   |
+   = note: `-D clippy::unwrap-used` implied by `-D warnings`
+   = help: if this value is an `None`, it will panic
+
+error: used `expect()` on `an Option` value
+  --> $DIR/unwrap_expect_used.rs:5:5
+   |
+LL |     Some(3).expect("Hello world!");
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = note: `-D clippy::expect-used` implied by `-D warnings`
+   = help: if this value is an `None`, it will panic
+
+error: used `unwrap()` on `a Result` value
+  --> $DIR/unwrap_expect_used.rs:8:5
+   |
+LL |     a.unwrap();
+   |     ^^^^^^^^^^
+   |
+   = help: if this value is an `Err`, it will panic
+
+error: used `expect()` on `a Result` value
+  --> $DIR/unwrap_expect_used.rs:9:5
+   |
+LL |     a.expect("Hello world!");
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = help: if this value is an `Err`, it will panic
+
+error: aborting due to 4 previous errors
+