revset: use `subset &` in `bisect`

This takes advantage of the `fullreposet` smartness.

revset  #0: bisect(range)
0) wall 0.014007 comb 0.010000 user 0.010000 sys 0.000000 (best of 115)
1) wall 0.005556 comb 0.010000 user 0.010000 sys 0.000000 (best of 235)

mercurial/revset.py

@@ -426,7 +426,7 b' def bisect(repo, subset, x):'
     # i18n: "bisect" is a keyword
     status = getstring(x, _("bisect requires a string")).lower()
     state = set(hbisect.get(repo, status))
-    return subset.filter(state.__contains__)
+    return subset & state
 
 # Backward-compatibility
 # - no help entry so that we do not advertise it any more