[clang] [llvm] [clang-format] Add CI check confirming ClangFormatStyleOptions.rst is up-to-date. (PR #111513)

[Iuri Chaer via cfe-commits]

ichaer wrote:

> @ichaer I suggest that you split the workflow part to another patch so that we can get the cmake part approved.

It's a bit sad, but I get your point, let's make it more focused. 

https://github.com/llvm/llvm-project/pull/111513