fix(shed): remove itestd command to remove dependency on itest pkg (#12894)

itest package has a lot of funky things in its init() that get in the way of
some of the jobs of lotus-shed, including modifying logging and disabling
watchdog

Author: rvagg

cmd/lotus-shed/itestd.go

@@ -86,7 +86,6 @@ func main() {
 		terminationsCmd,
 		migrationsCmd,
 		diffCmd,
-		itestdCmd,
 		msigCmd,
 		invariantsCmd,
 		gasTraceCmd,