mac helper binaries: add default brew libexec path

After installing podman via brew, I expected a locally compiled one to
work as well.  But it failed as it could not find gvproxy.  It turns out
that brew installs it at /opt/homebrew/opt/podman/libexec/podman/gvproxy,
so I want the directory to be part of the default look-up paths.

Same applies to the `/usr/local/opt` paths used on Intel Macs.  Also
rearrange the order a bit.

Signed-off-by: Valentin Rothberg <vrothberg@redhat.com>

Author: Valentin Rothberg

pkg/config/config_darwin.go

@@ -30,9 +30,9 @@ func ifRootlessConfigPath() (string, error) {
 
 var defaultHelperBinariesDir = []string{
 	// Homebrew install paths
-	"/usr/local/opt/podman/libexec",
+	"/usr/local/opt/podman/libexec/podman",
+	"/opt/homebrew/opt/podman/libexec/podman",
 	"/opt/homebrew/bin",
-	"/opt/homebrew/opt/podman/libexec",
 	"/usr/local/bin",
 	// default paths
 	"/usr/local/libexec/podman",