Bottle robotlocomotion/director/clang-format@15

[jwnimmer-tri]

To support Noble (#21335), we need to bump our clang-format version. (Noble does not have clang-format-12, which is what we currently use.)

I don't think #19295 will be ready in time, so that means we'll need to bottle a new clang-format on macOS so that we have a uniform version on all platforms.

Please create director bottles for clang-format@15 providing clang-format-15.

For reference, here was the brew formula for version 15 when it was the latest:
https://github.com/Homebrew/homebrew-core/blob/04cead37/Formula/clang-format.rb

Or, in the alternative, I wonder if https://formulae.brew.sh/formula/llvm@15 provides a clang-format binary we could use?

[jwnimmer-tri]

Aha, indeed brew llvm@15 gives us /opt/homebrew/opt/llvm@15/bin/clang-format in a jiffy. No need to make a new bottle.