[clang-tools-extra] [clang-tidy] Improve redundant-casting check for binary operation (PR #191386)

[Gaurav Dhingra via cfe-commits]

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@@ -168,6 +170,20 @@ void testFunctionalCastWithInitExpr(unsigned a) {
   unsigned c = unsigned{0};
 }
 
+void testBinaryOperatorRedundantCasting() {
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gxyd wrote:

Done, I've added more test cases for these.

https://github.com/llvm/llvm-project/pull/191386