convert all applicable commands to new 2x faster annexed file seeking

This removes all calls to inAnnex, except for some involving --batch.
It may be that the batch code could get a similar speedup, but I don't
know if people habitually pass a huge number of files through --batch
that git-annex does not need to do anything to process, so I skipped it
for now.

A few calls to ifAnnexed remain, and might be worth doing more to
convert. In particular, Command.Sync has one that would probably speed
it up by a good amount.

(also removed some dead code from Command.Lock)

CmdLine/Action.hs

@@ -43,6 +43,9 @@ performCommandAction Command { cmdcheck = c, cmdname = name } seek cont = do
 commandActions :: [CommandStart] -> Annex ()
 commandActions = mapM_ commandAction
 
+commandAction' :: (a -> b -> CommandStart) -> a -> b -> Annex ()
+commandAction' start a b = commandAction $ start a b
+
 {- Runs one of the actions needed to perform a command.
  - Individual actions can fail without stopping the whole command,
  - including by throwing non-async exceptions.