We need to ignore the default CLT shim for git and find the _real_ path ourselves to properly skip git fetches before git is available. Otherwise, it _seems_ present, but is actually missing and will pop up the Xcode CLT installer dialog and fail to fetch git resources

Static libs are missing for OpenSSL@3 in current GitHub Actions macOS-14 runner
image is broken until it pulls in Homebrew/homebrew-core#169721

Removed "install from API" config too, since auto upgrades are disabled anyway.

Git lookup occurs before lsb_release might be available for distro
determination, leading to a quick crash from an UnsupportedDistroError.

Until we have a better way of doing distro detection, we'll need to avoid
doing anything distro-specific until we know lsb_release is available

xcrun is also a shim, and because we're optimizing for strap.sh & Homebrew, they'll install Xcode CLT anyway. Therefore, there's little value here in trying to be extra robust by using xcrun