[clang-tools-extra] [clang] [clang-tidy] fix match for binaryOperator in ExprMutationAnalyzer for misc-const-correctness (PR #70559)

[Qizhi Hu via cfe-commits]

jcsxky wrote:

how about adding a function call like `f<int>()`? will this can prevent clang to emit empty function body?

https://github.com/llvm/llvm-project/pull/70559