Add the m1 homebrew bin dir to the system binary search path. (#17411)
Add the m1 homebrew bin dir to the system binary search path. (#17411)

Previously we would fail to find brew-installed binaries on m1 systems
(on macos intel systems, brew installs into /usr/local/bin).
pantsbuild/pants,pantsbuild/pants,pantsbuild/pants,pantsbuild/pants,pantsbuild/pants,pantsbuild/pants,pantsbuild/pants