Return the OS specific path to AWK (e.g.
"/usr/bin/awk"), or highlights if it's not installed. To manually set the
path to AWK, set the
AWK_PATH environment variable in your
file, which can be accomplished with the helper function
Path to AWK or
NA if AWK wasn't found.
auk_get_awk_path() #>  "/usr/bin/awk"