test: test both bundle1 and bundle2 paths in 'test-push-hook-lock.t'

The locking scheme is a bit different in each cases. So we explicitly test each
case.

tests/test-push-hook-lock.t

@@ -26,7 +26,7 b''
   $ echo bar >> 3/foo
   $ hg --cwd 3 ci -m bar
 
-  $ hg --cwd 3 push ../2
+  $ hg --cwd 3 push ../2 --config experimental.bundle2-exp=False
   pushing to ../2
   searching for changes
   adding changesets
@@ -36,3 +36,15 b''
   lock:  user *, process * (*s) (glob)
   wlock: free
 
+  $ hg --cwd 1 --config extensions.strip= strip tip -q
+  $ hg --cwd 2 --config extensions.strip= strip tip -q
+  $ hg --cwd 3 push ../2 --config experimental.bundle2-exp=True
+  pushing to ../2
+  searching for changes
+  adding changesets
+  adding manifests
+  adding file changes
+  added 1 changesets with 1 changes to 1 files
+  lock:  user *, process * (*s) (glob)
+  wlock: user *, process * (*s) (glob)
+