[lldb][FormatEntity][NFCI] Refactor FunctionNameWithArgs into helper functions and use LLVM style#135031

Michael137 merged 1 commit intollvm:mainllvm/llvm-project:mainfrom

Michael137:lldb/name-with-args-cleanpuMichael137/llvm-project:lldb/name-with-args-cleanpuCopy head branch name to clipboard