[clang-format] Refactor SpaceBeforeParens to add options

The coding style of some projects requires to have more control on space
before opening parentheses.
The goal is to add the support of clang-format to more projects.
For example adding a space only for function definitions or
declarations.
This revision adds SpaceBeforeParensOptions to configure each option
independently from one another.

Differentiel Revision: https://reviews.llvm.org/D110833