[clang-format] Clang format option to control space inside function pointer declaration

Hello. Is there clang-format option to control space in function pointer declaration? Currently clang-format adds space between function pointer and return type inside alias

```
using FuncPtr = ReturnType (*)(Args...);
typedef ReturnType (*funcPTr2)(Args...);
```
and I want to keep this formatting
```
using FuncPtr = ReturnType(*)(Args...);
typedef ReturnType(*funcPTr2)(Args...);
```

Start with clang-format by running the two function-pointer examples and reviewing the existing formatting options and documentation. No source file or test is named in the issue, so locate the formatter's relevant spacing behavior first. Done means the requested spacing can be controlled by a documented option and is covered by formatter tests.

Written by the indexing model from the issue text.