Rollup merge of #5430 - michaelsproul:integer-arithmetic, r=flip1995

Disallow bit-shifting in integer_arithmetic

Make the `integer_arithmetic` lint detect all the operations that are defined as being capable of overflow in the [Rust Reference](https://doc.rust-lang.org/reference/expressions/operator-expr.html#overflow), by also linting for bit-shifting operations (`<<`, `>>`).

changelog: Disallow bit-shifting in `integer_arithmetic`

src/lintlist/mod.rs

@@ -853,7 +853,7 @@
     Lint {
         name: "integer_arithmetic",
         group: "restriction",
-        desc: "any integer arithmetic statement",
+        desc: "any integer arithmetic expression which could overflow or panic",
         deprecation: None,
         module: "arithmetic",
     },