Don't send clang-format arguments that aren't supported by its version

[sean-mcmanus]

    @sean-mcmanus #10072 Makes it impossible to use older versions (< 12) of clang-format, which don't have `--Wno-error=unknown` yet. 

The default version of the clang-format package in Ubuntu <= 20.04 cannot handle this option. Additionally, older versions of clang-format are still widely in use in my experience due to how formatting changes often between different versions.

I would therefore argue that the change from #10072 should not be published without an accompanying solution to this issue.

Originally posted by @saierd in #10102 (comment)

[sean-mcmanus]

This should enable clang-format 11 or older (regressed from 1.13.4) and clang-format 8 or older (which would fail with the default
"Visual Studio" style with 1.12.4 and earlier versions)...I think we still have a minimum requirement of like clang 4 or so though, but those versions seem too old to worry about.