[clang] [clang-format] Change BinPackParameters to an enum to add a BreakAlways (PR #101882)

[Owen Pan via cfe-commits]

owenca wrote:

We should rename the option and its values to e.g. `BreakParameters` and `Never`/`OnePerLine`/`Always`. See also https://github.com/llvm/llvm-project/pull/95013#discussion_r1703578003.

https://github.com/llvm/llvm-project/pull/101882