[clang-tools-extra] [clang-tidy] Fixed bugprone-non-zero-enum-to-bool-conversion (PR #131407)

[Piotr Zegar via cfe-commits]

================
@@ -126,4 +126,10 @@ void testCustomOperator(CustomOperatorEnum e) {
     if (!(e & E1)) {}
 }
 
+enum EmptyEnum {};
+
+bool testCustomOperator(EmptyEnum value) {
----------------
PiotrZSL wrote:

Because this is enum without enumerators = can hold any value = usually used to work as strong type

https://github.com/llvm/llvm-project/pull/131407