44d037cc25
Changing type of DiagnosticHandlerTy due to adding -Wcast-function-type-mismatch to -Wextra group(https://github.com/llvm/llvm-project/pull/86131#issuecomment-2018014179). Changed the reference argument DiagnosticInfo to a pointer and edited the test cases failing due to this change. Added another small change where Gtest api was throwing an warning due varargs argument not being passed.