Add watch wrapper to avoid abuse of specific commands

[ccoulombe]

Avoid abusing only specific commands (sq, squeue, and sacct) and defer to the original command otherwise.

Does not intercept other arguments except --interval. Use the same default values. Set interval minimally at 61 seconds or user provided value.

Side note: this will save some time for @mnnguyen

To test/tested

#alias watch="$PWD/watch"
#export OVERRIDE_WATCH_BIN=$(which watch)

# defer to original using its default interval
./watch
./watch ls
./watch ls squeue # if a directory has a command name

# does not impair default behavior
./watch -p ls
./watch -n 34 -p ls
./watch -c -n 200 ls -h

# wrap specific commands to 61s minimally
./watch -n 34 sq
./watch -n 34 squeue
./watch -n 34 sacct
./watch -c -n 34 sacct
./watch -c -n 200 sq
./watch --color -n 5 -- sq -u bob
./watch --color -n 5 -- squeue
./watch --color -n 5 -- sacct